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Finding the Fourth Proportional to 291.98, 402.92 and 167.64

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Solution

The fourth proportional to 291.98, 402.92 and 167.64 is: 231.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.98 : 402.92 = 167.64 : x
  2. Step 2: Convert to fraction form
    291.98/402.92 = 167.64/x
  3. Step 3: Cross multiply
    291.98x = 402.92 × 167.64
  4. Step 4: Simplify right side
    291.98x = 67,545.51
  5. Step 5: Solve for x
    x = 67,545.51/291.98
  6. Step 6: Final answer
    x = 231.34

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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.