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Finding the Fourth Proportional to 624.30, 861.39 and 375.54

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Solution

The fourth proportional to 624.30, 861.39 and 375.54 is: 518.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.30 : 861.39 = 375.54 : x
  2. Step 2: Convert to fraction form
    624.30/861.39 = 375.54/x
  3. Step 3: Cross multiply
    624.30x = 861.39 × 375.54
  4. Step 4: Simplify right side
    624.30x = 323,486.40
  5. Step 5: Solve for x
    x = 323,486.40/624.30
  6. Step 6: Final answer
    x = 518.16

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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.