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Finding the Fourth Proportional to 248.76, 342.80 and 178.70

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Solution

The fourth proportional to 248.76, 342.80 and 178.70 is: 246.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.76 : 342.80 = 178.70 : x
  2. Step 2: Convert to fraction form
    248.76/342.80 = 178.70/x
  3. Step 3: Cross multiply
    248.76x = 342.80 × 178.70
  4. Step 4: Simplify right side
    248.76x = 61,257.09
  5. Step 5: Solve for x
    x = 61,257.09/248.76
  6. Step 6: Final answer
    x = 246.25

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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.