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Finding the Fourth Proportional to 624.28, 861.90 and 514.12

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Solution

The fourth proportional to 624.28, 861.90 and 514.12 is: 709.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.28 : 861.90 = 514.12 : x
  2. Step 2: Convert to fraction form
    624.28/861.90 = 514.12/x
  3. Step 3: Cross multiply
    624.28x = 861.90 × 514.12
  4. Step 4: Simplify right side
    624.28x = 443,120.03
  5. Step 5: Solve for x
    x = 443,120.03/624.28
  6. Step 6: Final answer
    x = 709.81

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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.