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Finding the Fourth Proportional to 248.37, 342.76 and 137.86

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Solution

The fourth proportional to 248.37, 342.76 and 137.86 is: 190.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.37 : 342.76 = 137.86 : x
  2. Step 2: Convert to fraction form
    248.37/342.76 = 137.86/x
  3. Step 3: Cross multiply
    248.37x = 342.76 × 137.86
  4. Step 4: Simplify right side
    248.37x = 47,252.89
  5. Step 5: Solve for x
    x = 47,252.89/248.37
  6. Step 6: Final answer
    x = 190.25

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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.