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Finding the Fourth Proportional to 623.87, 861 and 375.26

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Solution

The fourth proportional to 623.87, 861 and 375.26 is: 517.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.87 : 861 = 375.26 : x
  2. Step 2: Convert to fraction form
    623.87/861 = 375.26/x
  3. Step 3: Cross multiply
    623.87x = 861 × 375.26
  4. Step 4: Simplify right side
    623.87x = 323,098.86
  5. Step 5: Solve for x
    x = 323,098.86/623.87
  6. Step 6: Final answer
    x = 517.89

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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.