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Finding the Fourth Proportional to 248.47, 372.60 and 145.79

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Solution

The fourth proportional to 248.47, 372.60 and 145.79 is: 218.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.47 : 372.60 = 145.79 : x
  2. Step 2: Convert to fraction form
    248.47/372.60 = 145.79/x
  3. Step 3: Cross multiply
    248.47x = 372.60 × 145.79
  4. Step 4: Simplify right side
    248.47x = 54,321.35
  5. Step 5: Solve for x
    x = 54,321.35/248.47
  6. Step 6: Final answer
    x = 218.62

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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.