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Finding the Fourth Proportional to 748.72, 1,033.28 and 417.16

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Solution

The fourth proportional to 748.72, 1,033.28 and 417.16 is: 575.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.72 : 1,033.28 = 417.16 : x
  2. Step 2: Convert to fraction form
    748.72/1,033.28 = 417.16/x
  3. Step 3: Cross multiply
    748.72x = 1,033.28 × 417.16
  4. Step 4: Simplify right side
    748.72x = 431,043.08
  5. Step 5: Solve for x
    x = 431,043.08/748.72
  6. Step 6: Final answer
    x = 575.71

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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.