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Finding the Third Proportional to 143.72 and 310.13

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Solution

The third proportional to 143.72 and 310.13 is: 669.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.72 : 310.13 = 310.13 : x
  2. Step 2: Convert to fraction form
    143.72/310.13 = 310.13/x
  3. Step 3: Cross multiply
    143.72x = 310.13 × 310.13
  4. Step 4: Simplify right side
    143.72x = 96,177.52
  5. Step 5: Solve for x
    x = 96,177.52/143.72
  6. Step 6: Final answer
    x = 669.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.