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Finding the Fourth Proportional to 956.08, 1,431.42 and 748.72

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Solution

The fourth proportional to 956.08, 1,431.42 and 748.72 is: 1,120.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.08 : 1,431.42 = 748.72 : x
  2. Step 2: Convert to fraction form
    956.08/1,431.42 = 748.72/x
  3. Step 3: Cross multiply
    956.08x = 1,431.42 × 748.72
  4. Step 4: Simplify right side
    956.08x = 1,071,732.78
  5. Step 5: Solve for x
    x = 1,071,732.78/956.08
  6. Step 6: Final answer
    x = 1,120.97

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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.