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Finding the Fourth Proportional to 248.23, 372.48 and 138.57

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Solution

The fourth proportional to 248.23, 372.48 and 138.57 is: 207.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.23 : 372.48 = 138.57 : x
  2. Step 2: Convert to fraction form
    248.23/372.48 = 138.57/x
  3. Step 3: Cross multiply
    248.23x = 372.48 × 138.57
  4. Step 4: Simplify right side
    248.23x = 51,614.55
  5. Step 5: Solve for x
    x = 51,614.55/248.23
  6. Step 6: Final answer
    x = 207.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.