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Finding the Fourth Proportional to 242.09, 333.86 and 159.28

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Solution

The fourth proportional to 242.09, 333.86 and 159.28 is: 219.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.09 : 333.86 = 159.28 : x
  2. Step 2: Convert to fraction form
    242.09/333.86 = 159.28/x
  3. Step 3: Cross multiply
    242.09x = 333.86 × 159.28
  4. Step 4: Simplify right side
    242.09x = 53,176.73
  5. Step 5: Solve for x
    x = 53,176.73/242.09
  6. Step 6: Final answer
    x = 219.66

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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.