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Finding the Fourth Proportional to 624.49, 861.82 and 358.98

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Solution

The fourth proportional to 624.49, 861.82 and 358.98 is: 495.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.49 : 861.82 = 358.98 : x
  2. Step 2: Convert to fraction form
    624.49/861.82 = 358.98/x
  3. Step 3: Cross multiply
    624.49x = 861.82 × 358.98
  4. Step 4: Simplify right side
    624.49x = 309,379.59
  5. Step 5: Solve for x
    x = 309,379.59/624.49
  6. Step 6: Final answer
    x = 495.41

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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.