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Finding the Fourth Proportional to 687.43, 949.48 and 500.62

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Solution

The fourth proportional to 687.43, 949.48 and 500.62 is: 691.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.43 : 949.48 = 500.62 : x
  2. Step 2: Convert to fraction form
    687.43/949.48 = 500.62/x
  3. Step 3: Cross multiply
    687.43x = 949.48 × 500.62
  4. Step 4: Simplify right side
    687.43x = 475,328.68
  5. Step 5: Solve for x
    x = 475,328.68/687.43
  6. Step 6: Final answer
    x = 691.46

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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.