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Finding the Fourth Proportional to 291.59, 402.39 and 160.61

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Solution

The fourth proportional to 291.59, 402.39 and 160.61 is: 221.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.59 : 402.39 = 160.61 : x
  2. Step 2: Convert to fraction form
    291.59/402.39 = 160.61/x
  3. Step 3: Cross multiply
    291.59x = 402.39 × 160.61
  4. Step 4: Simplify right side
    291.59x = 64,625.04
  5. Step 5: Solve for x
    x = 64,625.04/291.59
  6. Step 6: Final answer
    x = 221.63

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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.