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Finding the Fourth Proportional to 281.46, 421.69 and 240.46

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Solution

The fourth proportional to 281.46, 421.69 and 240.46 is: 360.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.46 : 421.69 = 240.46 : x
  2. Step 2: Convert to fraction form
    281.46/421.69 = 240.46/x
  3. Step 3: Cross multiply
    281.46x = 421.69 × 240.46
  4. Step 4: Simplify right side
    281.46x = 101,399.58
  5. Step 5: Solve for x
    x = 101,399.58/281.46
  6. Step 6: Final answer
    x = 360.26

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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.