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Finding the Third Proportional to 315.38 and 723.94

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Solution

The third proportional to 315.38 and 723.94 is: 1,661.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.38 : 723.94 = 723.94 : x
  2. Step 2: Convert to fraction form
    315.38/723.94 = 723.94/x
  3. Step 3: Cross multiply
    315.38x = 723.94 × 723.94
  4. Step 4: Simplify right side
    315.38x = 524,085.50
  5. Step 5: Solve for x
    x = 524,085.50/315.38
  6. Step 6: Final answer
    x = 1,661.79

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.