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Finding the Fourth Proportional to 624.40, 861.17 and 375.66

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Solution

The fourth proportional to 624.40, 861.17 and 375.66 is: 518.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.40 : 861.17 = 375.66 : x
  2. Step 2: Convert to fraction form
    624.40/861.17 = 375.66/x
  3. Step 3: Cross multiply
    624.40x = 861.17 × 375.66
  4. Step 4: Simplify right side
    624.40x = 323,505.24
  5. Step 5: Solve for x
    x = 323,505.24/624.40
  6. Step 6: Final answer
    x = 518.11

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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.