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Finding the Fourth Proportional to 275.84, 380.72 and 159.41

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Solution

The fourth proportional to 275.84, 380.72 and 159.41 is: 220.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.84 : 380.72 = 159.41 : x
  2. Step 2: Convert to fraction form
    275.84/380.72 = 159.41/x
  3. Step 3: Cross multiply
    275.84x = 380.72 × 159.41
  4. Step 4: Simplify right side
    275.84x = 60,689.78
  5. Step 5: Solve for x
    x = 60,689.78/275.84
  6. Step 6: Final answer
    x = 220.02

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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.