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Finding the Fourth Proportional to 246.89, 340.81 and 153.72

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Solution

The fourth proportional to 246.89, 340.81 and 153.72 is: 212.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.89 : 340.81 = 153.72 : x
  2. Step 2: Convert to fraction form
    246.89/340.81 = 153.72/x
  3. Step 3: Cross multiply
    246.89x = 340.81 × 153.72
  4. Step 4: Simplify right side
    246.89x = 52,387.73
  5. Step 5: Solve for x
    x = 52,387.73/246.89
  6. Step 6: Final answer
    x = 212.19

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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.