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Finding the Fourth Proportional to 955.52, 1,317.76 and 748.16

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Solution

The fourth proportional to 955.52, 1,317.76 and 748.16 is: 1,031.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.52 : 1,317.76 = 748.16 : x
  2. Step 2: Convert to fraction form
    955.52/1,317.76 = 748.16/x
  3. Step 3: Cross multiply
    955.52x = 1,317.76 × 748.16
  4. Step 4: Simplify right side
    955.52x = 985,895.32
  5. Step 5: Solve for x
    x = 985,895.32/955.52
  6. Step 6: Final answer
    x = 1,031.79

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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.