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Finding the Third Proportional to 143.44 and 328.78

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Solution

The third proportional to 143.44 and 328.78 is: 753.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.44 : 328.78 = 328.78 : x
  2. Step 2: Convert to fraction form
    143.44/328.78 = 328.78/x
  3. Step 3: Cross multiply
    143.44x = 328.78 × 328.78
  4. Step 4: Simplify right side
    143.44x = 108,097.11
  5. Step 5: Solve for x
    x = 108,097.11/143.44
  6. Step 6: Final answer
    x = 753.62

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Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.