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Finding the Fourth Proportional to 623.90, 861.17 and 375.23

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Solution

The fourth proportional to 623.90, 861.17 and 375.23 is: 517.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.90 : 861.17 = 375.23 : x
  2. Step 2: Convert to fraction form
    623.90/861.17 = 375.23/x
  3. Step 3: Cross multiply
    623.90x = 861.17 × 375.23
  4. Step 4: Simplify right side
    623.90x = 323,137.10
  5. Step 5: Solve for x
    x = 323,137.10/623.90
  6. Step 6: Final answer
    x = 517.93

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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.