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Finding the Fourth Proportional to 754.62, 1,129.77 and 694.14

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Solution

The fourth proportional to 754.62, 1,129.77 and 694.14 is: 1,039.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.62 : 1,129.77 = 694.14 : x
  2. Step 2: Convert to fraction form
    754.62/1,129.77 = 694.14/x
  3. Step 3: Cross multiply
    754.62x = 1,129.77 × 694.14
  4. Step 4: Simplify right side
    754.62x = 784,218.55
  5. Step 5: Solve for x
    x = 784,218.55/754.62
  6. Step 6: Final answer
    x = 1,039.22

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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.