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Finding the Fourth Proportional to 246.78, 342.02 and 242.17

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Solution

The fourth proportional to 246.78, 342.02 and 242.17 is: 335.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.78 : 342.02 = 242.17 : x
  2. Step 2: Convert to fraction form
    246.78/342.02 = 242.17/x
  3. Step 3: Cross multiply
    246.78x = 342.02 × 242.17
  4. Step 4: Simplify right side
    246.78x = 82,826.73
  5. Step 5: Solve for x
    x = 82,826.73/246.78
  6. Step 6: Final answer
    x = 335.63

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.