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Finding the Fourth Proportional to 624.42, 861.42 and 414.30

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Solution

The fourth proportional to 624.42, 861.42 and 414.30 is: 571.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.42 : 861.42 = 414.30 : x
  2. Step 2: Convert to fraction form
    624.42/861.42 = 414.30/x
  3. Step 3: Cross multiply
    624.42x = 861.42 × 414.30
  4. Step 4: Simplify right side
    624.42x = 356,886.31
  5. Step 5: Solve for x
    x = 356,886.31/624.42
  6. Step 6: Final answer
    x = 571.55

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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.