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Finding the Fourth Proportional to 949.32, 1,424.39 and 516.42

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Solution

The fourth proportional to 949.32, 1,424.39 and 516.42 is: 774.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.32 : 1,424.39 = 516.42 : x
  2. Step 2: Convert to fraction form
    949.32/1,424.39 = 516.42/x
  3. Step 3: Cross multiply
    949.32x = 1,424.39 × 516.42
  4. Step 4: Simplify right side
    949.32x = 735,580.90
  5. Step 5: Solve for x
    x = 735,580.90/949.32
  6. Step 6: Final answer
    x = 774.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.