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Finding the Fourth Proportional to 748.91, 1,033.48 and 417.34

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Solution

The fourth proportional to 748.91, 1,033.48 and 417.34 is: 575.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.91 : 1,033.48 = 417.34 : x
  2. Step 2: Convert to fraction form
    748.91/1,033.48 = 417.34/x
  3. Step 3: Cross multiply
    748.91x = 1,033.48 × 417.34
  4. Step 4: Simplify right side
    748.91x = 431,306.20
  5. Step 5: Solve for x
    x = 431,306.20/748.91
  6. Step 6: Final answer
    x = 575.91

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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.