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Finding the Fourth Proportional to 961.46, 1,439.40 and 731.26

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Solution

The fourth proportional to 961.46, 1,439.40 and 731.26 is: 1,094.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.46 : 1,439.40 = 731.26 : x
  2. Step 2: Convert to fraction form
    961.46/1,439.40 = 731.26/x
  3. Step 3: Cross multiply
    961.46x = 1,439.40 × 731.26
  4. Step 4: Simplify right side
    961.46x = 1,052,575.64
  5. Step 5: Solve for x
    x = 1,052,575.64/961.46
  6. Step 6: Final answer
    x = 1,094.77

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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.