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Finding the Fourth Proportional to 248.41, 342.79 and 137.89

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Solution

The fourth proportional to 248.41, 342.79 and 137.89 is: 190.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.41 : 342.79 = 137.89 : x
  2. Step 2: Convert to fraction form
    248.41/342.79 = 137.89/x
  3. Step 3: Cross multiply
    248.41x = 342.79 × 137.89
  4. Step 4: Simplify right side
    248.41x = 47,267.31
  5. Step 5: Solve for x
    x = 47,267.31/248.41
  6. Step 6: Final answer
    x = 190.28

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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.