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Finding the Third Proportional to 489.88 and 901.75

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Solution

The third proportional to 489.88 and 901.75 is: 1,659.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.88 : 901.75 = 901.75 : x
  2. Step 2: Convert to fraction form
    489.88/901.75 = 901.75/x
  3. Step 3: Cross multiply
    489.88x = 901.75 × 901.75
  4. Step 4: Simplify right side
    489.88x = 813,153.06
  5. Step 5: Solve for x
    x = 813,153.06/489.88
  6. Step 6: Final answer
    x = 1,659.92

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.