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Finding the Fourth Proportional to 410.92, 615.56 and 280.60

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Solution

The fourth proportional to 410.92, 615.56 and 280.60 is: 420.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.92 : 615.56 = 280.60 : x
  2. Step 2: Convert to fraction form
    410.92/615.56 = 280.60/x
  3. Step 3: Cross multiply
    410.92x = 615.56 × 280.60
  4. Step 4: Simplify right side
    410.92x = 172,725.30
  5. Step 5: Solve for x
    x = 172,725.30/410.92
  6. Step 6: Final answer
    x = 420.34

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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.