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Finding the Fourth Proportional to 456.60, 685.65 and 449.82

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Solution

The fourth proportional to 456.60, 685.65 and 449.82 is: 675.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.60 : 685.65 = 449.82 : x
  2. Step 2: Convert to fraction form
    456.60/685.65 = 449.82/x
  3. Step 3: Cross multiply
    456.60x = 685.65 × 449.82
  4. Step 4: Simplify right side
    456.60x = 308,419.08
  5. Step 5: Solve for x
    x = 308,419.08/456.60
  6. Step 6: Final answer
    x = 675.47

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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.