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Finding the Third Proportional to 218.25 and 340.88

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Solution

The third proportional to 218.25 and 340.88 is: 532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.25 : 340.88 = 340.88 : x
  2. Step 2: Convert to fraction form
    218.25/340.88 = 340.88/x
  3. Step 3: Cross multiply
    218.25x = 340.88 × 340.88
  4. Step 4: Simplify right side
    218.25x = 116,195.77
  5. Step 5: Solve for x
    x = 116,195.77/218.25
  6. Step 6: Final answer
    x = 532.40

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.