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Finding the Third Proportional to 186.47 and 421.88

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Solution

The third proportional to 186.47 and 421.88 is: 954.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.47 : 421.88 = 421.88 : x
  2. Step 2: Convert to fraction form
    186.47/421.88 = 421.88/x
  3. Step 3: Cross multiply
    186.47x = 421.88 × 421.88
  4. Step 4: Simplify right side
    186.47x = 177,978.52
  5. Step 5: Solve for x
    x = 177,978.52/186.47
  6. Step 6: Final answer
    x = 954.47

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Why These Related Problems?

These problems maintain the same ratio (2.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.