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Finding the Fourth Proportional to 625.17, 861.73 and 500.63

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Solution

The fourth proportional to 625.17, 861.73 and 500.63 is: 690.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.17 : 861.73 = 500.63 : x
  2. Step 2: Convert to fraction form
    625.17/861.73 = 500.63/x
  3. Step 3: Cross multiply
    625.17x = 861.73 × 500.63
  4. Step 4: Simplify right side
    625.17x = 431,408.79
  5. Step 5: Solve for x
    x = 431,408.79/625.17
  6. Step 6: Final answer
    x = 690.07

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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.