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Finding the Fourth Proportional to 853.92, 1,177.20 and 748.08

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Solution

The fourth proportional to 853.92, 1,177.20 and 748.08 is: 1,031.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.92 : 1,177.20 = 748.08 : x
  2. Step 2: Convert to fraction form
    853.92/1,177.20 = 748.08/x
  3. Step 3: Cross multiply
    853.92x = 1,177.20 × 748.08
  4. Step 4: Simplify right side
    853.92x = 880,639.78
  5. Step 5: Solve for x
    x = 880,639.78/853.92
  6. Step 6: Final answer
    x = 1,031.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.