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Finding the Fourth Proportional to 624.11, 861.21 and 344.33

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Solution

The fourth proportional to 624.11, 861.21 and 344.33 is: 475.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.11 : 861.21 = 344.33 : x
  2. Step 2: Convert to fraction form
    624.11/861.21 = 344.33/x
  3. Step 3: Cross multiply
    624.11x = 861.21 × 344.33
  4. Step 4: Simplify right side
    624.11x = 296,542.59
  5. Step 5: Solve for x
    x = 296,542.59/624.11
  6. Step 6: Final answer
    x = 475.14

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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.