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Finding the Fourth Proportional to 243.10, 335.59 and 155.82

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Solution

The fourth proportional to 243.10, 335.59 and 155.82 is: 215.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.10 : 335.59 = 155.82 : x
  2. Step 2: Convert to fraction form
    243.10/335.59 = 155.82/x
  3. Step 3: Cross multiply
    243.10x = 335.59 × 155.82
  4. Step 4: Simplify right side
    243.10x = 52,293.38
  5. Step 5: Solve for x
    x = 52,293.38/243.10
  6. Step 6: Final answer
    x = 215.11

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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.