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Finding the Fourth Proportional to 456.68, 685.92 and 274.44

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Solution

The fourth proportional to 456.68, 685.92 and 274.44 is: 412.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.68 : 685.92 = 274.44 : x
  2. Step 2: Convert to fraction form
    456.68/685.92 = 274.44/x
  3. Step 3: Cross multiply
    456.68x = 685.92 × 274.44
  4. Step 4: Simplify right side
    456.68x = 188,243.88
  5. Step 5: Solve for x
    x = 188,243.88/456.68
  6. Step 6: Final answer
    x = 412.20

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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.