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Finding the Third Proportional to 213.19 and 330.19

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Solution

The third proportional to 213.19 and 330.19 is: 511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.19 : 330.19 = 330.19 : x
  2. Step 2: Convert to fraction form
    213.19/330.19 = 330.19/x
  3. Step 3: Cross multiply
    213.19x = 330.19 × 330.19
  4. Step 4: Simplify right side
    213.19x = 109,023.79
  5. Step 5: Solve for x
    x = 109,023.79/213.19
  6. Step 6: Final answer
    x = 511.40

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.