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Finding the Fourth Proportional to 624.28, 861.32 and 375.51

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Solution

The fourth proportional to 624.28, 861.32 and 375.51 is: 518.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.28 : 861.32 = 375.51 : x
  2. Step 2: Convert to fraction form
    624.28/861.32 = 375.51/x
  3. Step 3: Cross multiply
    624.28x = 861.32 × 375.51
  4. Step 4: Simplify right side
    624.28x = 323,432.40
  5. Step 5: Solve for x
    x = 323,432.40/624.28
  6. Step 6: Final answer
    x = 518.09

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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.