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Finding the Fourth Proportional to 748.12, 1,032.29 and 416.55

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Solution

The fourth proportional to 748.12, 1,032.29 and 416.55 is: 574.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.12 : 1,032.29 = 416.55 : x
  2. Step 2: Convert to fraction form
    748.12/1,032.29 = 416.55/x
  3. Step 3: Cross multiply
    748.12x = 1,032.29 × 416.55
  4. Step 4: Simplify right side
    748.12x = 430,000.40
  5. Step 5: Solve for x
    x = 430,000.40/748.12
  6. Step 6: Final answer
    x = 574.77

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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.