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Finding the Fourth Proportional to 892.87, 1,232.16 and 499.89

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Solution

The fourth proportional to 892.87, 1,232.16 and 499.89 is: 689.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.87 : 1,232.16 = 499.89 : x
  2. Step 2: Convert to fraction form
    892.87/1,232.16 = 499.89/x
  3. Step 3: Cross multiply
    892.87x = 1,232.16 × 499.89
  4. Step 4: Simplify right side
    892.87x = 615,944.46
  5. Step 5: Solve for x
    x = 615,944.46/892.87
  6. Step 6: Final answer
    x = 689.85

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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.