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Finding the Fourth Proportional to 248.37, 342.63 and 143.37

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Solution

The fourth proportional to 248.37, 342.63 and 143.37 is: 197.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.37 : 342.63 = 143.37 : x
  2. Step 2: Convert to fraction form
    248.37/342.63 = 143.37/x
  3. Step 3: Cross multiply
    248.37x = 342.63 × 143.37
  4. Step 4: Simplify right side
    248.37x = 49,122.86
  5. Step 5: Solve for x
    x = 49,122.86/248.37
  6. Step 6: Final answer
    x = 197.78

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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.