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Finding the Fourth Proportional to 280.56, 421.14 and 229.80

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Solution

The fourth proportional to 280.56, 421.14 and 229.80 is: 344.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.56 : 421.14 = 229.80 : x
  2. Step 2: Convert to fraction form
    280.56/421.14 = 229.80/x
  3. Step 3: Cross multiply
    280.56x = 421.14 × 229.80
  4. Step 4: Simplify right side
    280.56x = 96,777.97
  5. Step 5: Solve for x
    x = 96,777.97/280.56
  6. Step 6: Final answer
    x = 344.95

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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.