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Finding the Third Proportional to 489.94 and 876.38

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Solution

The third proportional to 489.94 and 876.38 is: 1,567.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.94 : 876.38 = 876.38 : x
  2. Step 2: Convert to fraction form
    489.94/876.38 = 876.38/x
  3. Step 3: Cross multiply
    489.94x = 876.38 × 876.38
  4. Step 4: Simplify right side
    489.94x = 768,033.14
  5. Step 5: Solve for x
    x = 768,033.14/489.94
  6. Step 6: Final answer
    x = 1,567.61

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.