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Finding the Fourth Proportional to 564.60, 845.28 and 449.20

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Solution

The fourth proportional to 564.60, 845.28 and 449.20 is: 672.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.60 : 845.28 = 449.20 : x
  2. Step 2: Convert to fraction form
    564.60/845.28 = 449.20/x
  3. Step 3: Cross multiply
    564.60x = 845.28 × 449.20
  4. Step 4: Simplify right side
    564.60x = 379,699.78
  5. Step 5: Solve for x
    x = 379,699.78/564.60
  6. Step 6: Final answer
    x = 672.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.