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Finding the Fourth Proportional to 695,414.91, 959,660.96 and 389,488.71

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Solution

The fourth proportional to 695,414.91, 959,660.96 and 389,488.71 is: 537,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,414.91 : 959,660.96 = 389,488.71 : x
  2. Step 2: Convert to fraction form
    695,414.91/959,660.96 = 389,488.71/x
  3. Step 3: Cross multiply
    695,414.91x = 959,660.96 × 389,488.71
  4. Step 4: Simplify right side
    695,414.91x = 373,777,107,400.32
  5. Step 5: Solve for x
    x = 373,777,107,400.32/695,414.91
  6. Step 6: Final answer
    x = 537,487.91

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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.