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Finding the Fourth Proportional to 281.04, 422.36 and 261.60

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Solution

The fourth proportional to 281.04, 422.36 and 261.60 is: 393.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.04 : 422.36 = 261.60 : x
  2. Step 2: Convert to fraction form
    281.04/422.36 = 261.60/x
  3. Step 3: Cross multiply
    281.04x = 422.36 × 261.60
  4. Step 4: Simplify right side
    281.04x = 110,489.38
  5. Step 5: Solve for x
    x = 110,489.38/281.04
  6. Step 6: Final answer
    x = 393.14

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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.