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Finding the Fourth Proportional to 717,740.86, 990,473.24 and 391,067.47

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Solution

The fourth proportional to 717,740.86, 990,473.24 and 391,067.47 is: 539,668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,740.86 : 990,473.24 = 391,067.47 : x
  2. Step 2: Convert to fraction form
    717,740.86/990,473.24 = 391,067.47/x
  3. Step 3: Cross multiply
    717,740.86x = 990,473.24 × 391,067.47
  4. Step 4: Simplify right side
    717,740.86x = 387,341,864,069.50
  5. Step 5: Solve for x
    x = 387,341,864,069.50/717,740.86
  6. Step 6: Final answer
    x = 539,668.12

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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.