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Finding the Fourth Proportional to 248.63, 343.08 and 138.06

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Solution

The fourth proportional to 248.63, 343.08 and 138.06 is: 190.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.63 : 343.08 = 138.06 : x
  2. Step 2: Convert to fraction form
    248.63/343.08 = 138.06/x
  3. Step 3: Cross multiply
    248.63x = 343.08 × 138.06
  4. Step 4: Simplify right side
    248.63x = 47,365.62
  5. Step 5: Solve for x
    x = 47,365.62/248.63
  6. Step 6: Final answer
    x = 190.51

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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.