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Finding the Fourth Proportional to 248.32, 342.61 and 143.38

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Solution

The fourth proportional to 248.32, 342.61 and 143.38 is: 197.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.32 : 342.61 = 143.38 : x
  2. Step 2: Convert to fraction form
    248.32/342.61 = 143.38/x
  3. Step 3: Cross multiply
    248.32x = 342.61 × 143.38
  4. Step 4: Simplify right side
    248.32x = 49,123.42
  5. Step 5: Solve for x
    x = 49,123.42/248.32
  6. Step 6: Final answer
    x = 197.82

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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.