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Finding the Fourth Proportional to 459.20, 632.40 and 449.12

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Solution

The fourth proportional to 459.20, 632.40 and 449.12 is: 618.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.20 : 632.40 = 449.12 : x
  2. Step 2: Convert to fraction form
    459.20/632.40 = 449.12/x
  3. Step 3: Cross multiply
    459.20x = 632.40 × 449.12
  4. Step 4: Simplify right side
    459.20x = 284,023.49
  5. Step 5: Solve for x
    x = 284,023.49/459.20
  6. Step 6: Final answer
    x = 618.52

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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.