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Finding the Fourth Proportional to 717,894,957.96, 990,693,083.80 and 400,355,548.74

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Solution

The fourth proportional to 717,894,957.96, 990,693,083.80 and 400,355,548.74 is: 552,489,565.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,894,957.96 : 990,693,083.80 = 400,355,548.74 : x
  2. Step 2: Convert to fraction form
    717,894,957.96/990,693,083.80 = 400,355,548.74/x
  3. Step 3: Cross multiply
    717,894,957.96x = 990,693,083.80 × 400,355,548.74
  4. Step 4: Simplify right side
    717,894,957.96x = 396,629,473,197,671,808
  5. Step 5: Solve for x
    x = 396,629,473,197,671,808/717,894,957.96
  6. Step 6: Final answer
    x = 552,489,565.22

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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.