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Finding the Fourth Proportional to 748.11, 1,032.15 and 449.22

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Solution

The fourth proportional to 748.11, 1,032.15 and 449.22 is: 619.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.11 : 1,032.15 = 449.22 : x
  2. Step 2: Convert to fraction form
    748.11/1,032.15 = 449.22/x
  3. Step 3: Cross multiply
    748.11x = 1,032.15 × 449.22
  4. Step 4: Simplify right side
    748.11x = 463,662.42
  5. Step 5: Solve for x
    x = 463,662.42/748.11
  6. Step 6: Final answer
    x = 619.78

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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.