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Finding the Fourth Proportional to 717,894,954.96, 990,693,079.66 and 400,355,545.74

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Solution

The fourth proportional to 717,894,954.96, 990,693,079.66 and 400,355,545.74 is: 552,489,561.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,894,954.96 : 990,693,079.66 = 400,355,545.74 : x
  2. Step 2: Convert to fraction form
    717,894,954.96/990,693,079.66 = 400,355,545.74/x
  3. Step 3: Cross multiply
    717,894,954.96x = 990,693,079.66 × 400,355,545.74
  4. Step 4: Simplify right side
    717,894,954.96x = 396,629,468,568,120,576
  5. Step 5: Solve for x
    x = 396,629,468,568,120,576/717,894,954.96
  6. Step 6: Final answer
    x = 552,489,561.08

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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.