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Finding the Fourth Proportional to 281.17, 421.59 and 151.12

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Solution

The fourth proportional to 281.17, 421.59 and 151.12 is: 226.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.17 : 421.59 = 151.12 : x
  2. Step 2: Convert to fraction form
    281.17/421.59 = 151.12/x
  3. Step 3: Cross multiply
    281.17x = 421.59 × 151.12
  4. Step 4: Simplify right side
    281.17x = 63,708.57
  5. Step 5: Solve for x
    x = 63,708.57/281.17
  6. Step 6: Final answer
    x = 226.59

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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.