Home / 1,245,621,097.80-1,868,431,646.70-727,784,987.40

Finding the Fourth Proportional to 1,245,621,097.80, 1,868,431,646.70 and 727,784,987.40

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Solution

The fourth proportional to 1,245,621,097.80, 1,868,431,646.70 and 727,784,987.40 is: 1,091,677,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,621,097.80 : 1,868,431,646.70 = 727,784,987.40 : x
  2. Step 2: Convert to fraction form
    1,245,621,097.80/1,868,431,646.70 = 727,784,987.40/x
  3. Step 3: Cross multiply
    1,245,621,097.80x = 1,868,431,646.70 × 727,784,987.40
  4. Step 4: Simplify right side
    1,245,621,097.80x = 1,359,816,502,451,320,832
  5. Step 5: Solve for x
    x = 1,359,816,502,451,320,832/1,245,621,097.80
  6. Step 6: Final answer
    x = 1,091,677,481.10

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Half scale
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Double scale
Find fourth proportional to 1,245,621,098.80, 1,868,431,648.20 and 727,784,988.40
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.