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Finding the Third Proportional to 912.25 and 1,915.75

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Solution

The third proportional to 912.25 and 1,915.75 is: 4,023.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.25 : 1,915.75 = 1,915.75 : x
  2. Step 2: Convert to fraction form
    912.25/1,915.75 = 1,915.75/x
  3. Step 3: Cross multiply
    912.25x = 1,915.75 × 1,915.75
  4. Step 4: Simplify right side
    912.25x = 3,670,098.06
  5. Step 5: Solve for x
    x = 3,670,098.06/912.25
  6. Step 6: Final answer
    x = 4,023.13

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.