Home / 1,245,621,090.30-1,868,431,635.45-727,784,979.90

Finding the Fourth Proportional to 1,245,621,090.30, 1,868,431,635.45 and 727,784,979.90

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Solution

The fourth proportional to 1,245,621,090.30, 1,868,431,635.45 and 727,784,979.90 is: 1,091,677,469.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,621,090.30 : 1,868,431,635.45 = 727,784,979.90 : x
  2. Step 2: Convert to fraction form
    1,245,621,090.30/1,868,431,635.45 = 727,784,979.90/x
  3. Step 3: Cross multiply
    1,245,621,090.30x = 1,868,431,635.45 × 727,784,979.90
  4. Step 4: Simplify right side
    1,245,621,090.30x = 1,359,816,480,250,502,400
  5. Step 5: Solve for x
    x = 1,359,816,480,250,502,400/1,245,621,090.30
  6. Step 6: Final answer
    x = 1,091,677,469.85

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Double scale
Find fourth proportional to 1,245,621,091.30, 1,868,431,636.95 and 727,784,980.90
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.