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Finding the Fourth Proportional to 281.86, 422.72 and 135.52

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Solution

The fourth proportional to 281.86, 422.72 and 135.52 is: 203.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.86 : 422.72 = 135.52 : x
  2. Step 2: Convert to fraction form
    281.86/422.72 = 135.52/x
  3. Step 3: Cross multiply
    281.86x = 422.72 × 135.52
  4. Step 4: Simplify right side
    281.86x = 57,284.22
  5. Step 5: Solve for x
    x = 57,284.22/281.86
  6. Step 6: Final answer
    x = 203.24

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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.