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Finding the Fourth Proportional to 248.75, 343.31 and 145.25

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Solution

The fourth proportional to 248.75, 343.31 and 145.25 is: 200.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.75 : 343.31 = 145.25 : x
  2. Step 2: Convert to fraction form
    248.75/343.31 = 145.25/x
  3. Step 3: Cross multiply
    248.75x = 343.31 × 145.25
  4. Step 4: Simplify right side
    248.75x = 49,865.78
  5. Step 5: Solve for x
    x = 49,865.78/248.75
  6. Step 6: Final answer
    x = 200.47

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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.