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Finding the Fourth Proportional to 631.91, 875.42 and 616.79

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Solution

The fourth proportional to 631.91, 875.42 and 616.79 is: 854.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.91 : 875.42 = 616.79 : x
  2. Step 2: Convert to fraction form
    631.91/875.42 = 616.79/x
  3. Step 3: Cross multiply
    631.91x = 875.42 × 616.79
  4. Step 4: Simplify right side
    631.91x = 539,950.30
  5. Step 5: Solve for x
    x = 539,950.30/631.91
  6. Step 6: Final answer
    x = 854.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.