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Finding the Fourth Proportional to 624.66, 861.99 and 344.90

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Solution

The fourth proportional to 624.66, 861.99 and 344.90 is: 475.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.66 : 861.99 = 344.90 : x
  2. Step 2: Convert to fraction form
    624.66/861.99 = 344.90/x
  3. Step 3: Cross multiply
    624.66x = 861.99 × 344.90
  4. Step 4: Simplify right side
    624.66x = 297,296.04
  5. Step 5: Solve for x
    x = 297,296.04/624.66
  6. Step 6: Final answer
    x = 475.93

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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.