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Finding the Third Proportional to 787.85 and 1,712.39

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Solution

The third proportional to 787.85 and 1,712.39 is: 3,721.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.85 : 1,712.39 = 1,712.39 : x
  2. Step 2: Convert to fraction form
    787.85/1,712.39 = 1,712.39/x
  3. Step 3: Cross multiply
    787.85x = 1,712.39 × 1,712.39
  4. Step 4: Simplify right side
    787.85x = 2,932,281.65
  5. Step 5: Solve for x
    x = 2,932,281.65/787.85
  6. Step 6: Final answer
    x = 3,721.87

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.