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Finding the Fourth Proportional to 291.38, 402.08 and 160.38

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Solution

The fourth proportional to 291.38, 402.08 and 160.38 is: 221.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.38 : 402.08 = 160.38 : x
  2. Step 2: Convert to fraction form
    291.38/402.08 = 160.38/x
  3. Step 3: Cross multiply
    291.38x = 402.08 × 160.38
  4. Step 4: Simplify right side
    291.38x = 64,484.79
  5. Step 5: Solve for x
    x = 64,484.79/291.38
  6. Step 6: Final answer
    x = 221.31

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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.