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Finding the Fourth Proportional to 291.50, 402.35 and 167.23

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Solution

The fourth proportional to 291.50, 402.35 and 167.23 is: 230.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.50 : 402.35 = 167.23 : x
  2. Step 2: Convert to fraction form
    291.50/402.35 = 167.23/x
  3. Step 3: Cross multiply
    291.50x = 402.35 × 167.23
  4. Step 4: Simplify right side
    291.50x = 67,284.40
  5. Step 5: Solve for x
    x = 67,284.40/291.50
  6. Step 6: Final answer
    x = 230.82

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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.