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Finding the Fourth Proportional to 242.21, 334.39 and 159.46

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Solution

The fourth proportional to 242.21, 334.39 and 159.46 is: 220.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.21 : 334.39 = 159.46 : x
  2. Step 2: Convert to fraction form
    242.21/334.39 = 159.46/x
  3. Step 3: Cross multiply
    242.21x = 334.39 × 159.46
  4. Step 4: Simplify right side
    242.21x = 53,320.16
  5. Step 5: Solve for x
    x = 53,320.16/242.21
  6. Step 6: Final answer
    x = 220.14

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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.