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Finding the Fourth Proportional to 624.42, 861.57 and 358.88

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Solution

The fourth proportional to 624.42, 861.57 and 358.88 is: 495.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.42 : 861.57 = 358.88 : x
  2. Step 2: Convert to fraction form
    624.42/861.57 = 358.88/x
  3. Step 3: Cross multiply
    624.42x = 861.57 × 358.88
  4. Step 4: Simplify right side
    624.42x = 309,195.93
  5. Step 5: Solve for x
    x = 309,195.93/624.42
  6. Step 6: Final answer
    x = 495.17

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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.