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Finding the Fourth Proportional to 718,467.96, 991,464.54 and 396,177.96

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Solution

The fourth proportional to 718,467.96, 991,464.54 and 396,177.96 is: 546,713.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,467.96 : 991,464.54 = 396,177.96 : x
  2. Step 2: Convert to fraction form
    718,467.96/991,464.54 = 396,177.96/x
  3. Step 3: Cross multiply
    718,467.96x = 991,464.54 × 396,177.96
  4. Step 4: Simplify right side
    718,467.96x = 392,796,398,869.54
  5. Step 5: Solve for x
    x = 392,796,398,869.54/718,467.96
  6. Step 6: Final answer
    x = 546,713.87

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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.