Home / 717,387.14-990,039.01-395,097.15

Finding the Fourth Proportional to 717,387.14, 990,039.01 and 395,097.15

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Solution

The fourth proportional to 717,387.14, 990,039.01 and 395,097.15 is: 545,258.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,387.14 : 990,039.01 = 395,097.15 : x
  2. Step 2: Convert to fraction form
    717,387.14/990,039.01 = 395,097.15/x
  3. Step 3: Cross multiply
    717,387.14x = 990,039.01 × 395,097.15
  4. Step 4: Simplify right side
    717,387.14x = 391,161,591,239.82
  5. Step 5: Solve for x
    x = 391,161,591,239.82/717,387.14
  6. Step 6: Final answer
    x = 545,258.72

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.