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Finding the Fourth Proportional to 744.62, 1,115.70 and 527.12

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Solution

The fourth proportional to 744.62, 1,115.70 and 527.12 is: 789.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.62 : 1,115.70 = 527.12 : x
  2. Step 2: Convert to fraction form
    744.62/1,115.70 = 527.12/x
  3. Step 3: Cross multiply
    744.62x = 1,115.70 × 527.12
  4. Step 4: Simplify right side
    744.62x = 588,107.78
  5. Step 5: Solve for x
    x = 588,107.78/744.62
  6. Step 6: Final answer
    x = 789.81

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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.