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Finding the Fourth Proportional to 242.61, 334.68 and 153.94

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Solution

The fourth proportional to 242.61, 334.68 and 153.94 is: 212.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.61 : 334.68 = 153.94 : x
  2. Step 2: Convert to fraction form
    242.61/334.68 = 153.94/x
  3. Step 3: Cross multiply
    242.61x = 334.68 × 153.94
  4. Step 4: Simplify right side
    242.61x = 51,520.64
  5. Step 5: Solve for x
    x = 51,520.64/242.61
  6. Step 6: Final answer
    x = 212.36

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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.