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Finding the Fourth Proportional to 281.60, 422.40 and 108.32

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Solution

The fourth proportional to 281.60, 422.40 and 108.32 is: 162.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.60 : 422.40 = 108.32 : x
  2. Step 2: Convert to fraction form
    281.60/422.40 = 108.32/x
  3. Step 3: Cross multiply
    281.60x = 422.40 × 108.32
  4. Step 4: Simplify right side
    281.60x = 45,754.37
  5. Step 5: Solve for x
    x = 45,754.37/281.60
  6. Step 6: Final answer
    x = 162.48

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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.