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Finding the Fourth Proportional to 449.49, 672.08 and 398.46

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Solution

The fourth proportional to 449.49, 672.08 and 398.46 is: 595.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.49 : 672.08 = 398.46 : x
  2. Step 2: Convert to fraction form
    449.49/672.08 = 398.46/x
  3. Step 3: Cross multiply
    449.49x = 672.08 × 398.46
  4. Step 4: Simplify right side
    449.49x = 267,795.00
  5. Step 5: Solve for x
    x = 267,795.00/449.49
  6. Step 6: Final answer
    x = 595.78

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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.