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Finding the Fourth Proportional to 624.46, 861.20 and 476.82

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Solution

The fourth proportional to 624.46, 861.20 and 476.82 is: 657.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.46 : 861.20 = 476.82 : x
  2. Step 2: Convert to fraction form
    624.46/861.20 = 476.82/x
  3. Step 3: Cross multiply
    624.46x = 861.20 × 476.82
  4. Step 4: Simplify right side
    624.46x = 410,637.38
  5. Step 5: Solve for x
    x = 410,637.38/624.46
  6. Step 6: Final answer
    x = 657.59

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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.