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Finding the Fourth Proportional to 871.01, 1,304.18 and 760.28

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Solution

The fourth proportional to 871.01, 1,304.18 and 760.28 is: 1,138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.01 : 1,304.18 = 760.28 : x
  2. Step 2: Convert to fraction form
    871.01/1,304.18 = 760.28/x
  3. Step 3: Cross multiply
    871.01x = 1,304.18 × 760.28
  4. Step 4: Simplify right side
    871.01x = 991,531.65
  5. Step 5: Solve for x
    x = 991,531.65/871.01
  6. Step 6: Final answer
    x = 1,138.38

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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.