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Finding the Fourth Proportional to 291.53, 402.31 and 167.19

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Solution

The fourth proportional to 291.53, 402.31 and 167.19 is: 230.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.53 : 402.31 = 167.19 : x
  2. Step 2: Convert to fraction form
    291.53/402.31 = 167.19/x
  3. Step 3: Cross multiply
    291.53x = 402.31 × 167.19
  4. Step 4: Simplify right side
    291.53x = 67,262.21
  5. Step 5: Solve for x
    x = 67,262.21/291.53
  6. Step 6: Final answer
    x = 230.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.