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Finding the Fourth Proportional to 281.65, 422.46 and 99.03

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Solution

The fourth proportional to 281.65, 422.46 and 99.03 is: 148.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.65 : 422.46 = 99.03 : x
  2. Step 2: Convert to fraction form
    281.65/422.46 = 99.03/x
  3. Step 3: Cross multiply
    281.65x = 422.46 × 99.03
  4. Step 4: Simplify right side
    281.65x = 41,837.80
  5. Step 5: Solve for x
    x = 41,837.80/281.65
  6. Step 6: Final answer
    x = 148.55

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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.