Home / 1,245,620,425.80-1,868,430,638.70-727,784,315.40

Finding the Fourth Proportional to 1,245,620,425.80, 1,868,430,638.70 and 727,784,315.40

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Solution

The fourth proportional to 1,245,620,425.80, 1,868,430,638.70 and 727,784,315.40 is: 1,091,676,473.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,620,425.80 : 1,868,430,638.70 = 727,784,315.40 : x
  2. Step 2: Convert to fraction form
    1,245,620,425.80/1,868,430,638.70 = 727,784,315.40/x
  3. Step 3: Cross multiply
    1,245,620,425.80x = 1,868,430,638.70 × 727,784,315.40
  4. Step 4: Simplify right side
    1,245,620,425.80x = 1,359,814,513,258,664,192
  5. Step 5: Solve for x
    x = 1,359,814,513,258,664,192/1,245,620,425.80
  6. Step 6: Final answer
    x = 1,091,676,473.10

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Half scale
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Double scale
Find fourth proportional to 1,245,620,426.80, 1,868,430,640.20 and 727,784,316.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.