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Finding the Fourth Proportional to 267.64, 399.65 and 231.16

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Solution

The fourth proportional to 267.64, 399.65 and 231.16 is: 345.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.64 : 399.65 = 231.16 : x
  2. Step 2: Convert to fraction form
    267.64/399.65 = 231.16/x
  3. Step 3: Cross multiply
    267.64x = 399.65 × 231.16
  4. Step 4: Simplify right side
    267.64x = 92,383.09
  5. Step 5: Solve for x
    x = 92,383.09/267.64
  6. Step 6: Final answer
    x = 345.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.