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Finding the Fourth Proportional to 243.18, 335.52 and 160.38

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Solution

The fourth proportional to 243.18, 335.52 and 160.38 is: 221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.18 : 335.52 = 160.38 : x
  2. Step 2: Convert to fraction form
    243.18/335.52 = 160.38/x
  3. Step 3: Cross multiply
    243.18x = 335.52 × 160.38
  4. Step 4: Simplify right side
    243.18x = 53,810.70
  5. Step 5: Solve for x
    x = 53,810.70/243.18
  6. Step 6: Final answer
    x = 221.28

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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.