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Finding the Third Proportional to 868.78 and 1,228.78

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Solution

The third proportional to 868.78 and 1,228.78 is: 1,737.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.78 : 1,228.78 = 1,228.78 : x
  2. Step 2: Convert to fraction form
    868.78/1,228.78 = 1,228.78/x
  3. Step 3: Cross multiply
    868.78x = 1,228.78 × 1,228.78
  4. Step 4: Simplify right side
    868.78x = 1,509,903.36
  5. Step 5: Solve for x
    x = 1,509,903.36/868.78
  6. Step 6: Final answer
    x = 1,737.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.