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Finding the Fourth Proportional to 242.19, 334.07 and 154.86

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Solution

The fourth proportional to 242.19, 334.07 and 154.86 is: 213.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.19 : 334.07 = 154.86 : x
  2. Step 2: Convert to fraction form
    242.19/334.07 = 154.86/x
  3. Step 3: Cross multiply
    242.19x = 334.07 × 154.86
  4. Step 4: Simplify right side
    242.19x = 51,733.21
  5. Step 5: Solve for x
    x = 51,733.21/242.19
  6. Step 6: Final answer
    x = 213.61

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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.