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Finding the Fourth Proportional to 624.18, 861.34 and 344.40

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Solution

The fourth proportional to 624.18, 861.34 and 344.40 is: 475.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.18 : 861.34 = 344.40 : x
  2. Step 2: Convert to fraction form
    624.18/861.34 = 344.40/x
  3. Step 3: Cross multiply
    624.18x = 861.34 × 344.40
  4. Step 4: Simplify right side
    624.18x = 296,645.50
  5. Step 5: Solve for x
    x = 296,645.50/624.18
  6. Step 6: Final answer
    x = 475.26

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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.