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Finding the Fourth Proportional to 717,456.97, 990,135.48 and 395,166.97

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Solution

The fourth proportional to 717,456.97, 990,135.48 and 395,166.97 is: 545,355.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,456.97 : 990,135.48 = 395,166.97 : x
  2. Step 2: Convert to fraction form
    717,456.97/990,135.48 = 395,166.97/x
  3. Step 3: Cross multiply
    717,456.97x = 990,135.48 × 395,166.97
  4. Step 4: Simplify right side
    717,456.97x = 391,268,837,521.10
  5. Step 5: Solve for x
    x = 391,268,837,521.10/717,456.97
  6. Step 6: Final answer
    x = 545,355.13

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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.