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Finding the Third Proportional to 186.75 and 310.88

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Solution

The third proportional to 186.75 and 310.88 is: 517.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.75 : 310.88 = 310.88 : x
  2. Step 2: Convert to fraction form
    186.75/310.88 = 310.88/x
  3. Step 3: Cross multiply
    186.75x = 310.88 × 310.88
  4. Step 4: Simplify right side
    186.75x = 96,643.27
  5. Step 5: Solve for x
    x = 96,643.27/186.75
  6. Step 6: Final answer
    x = 517.50

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.