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Finding the Third Proportional to 687.09 and 1,017.84

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Solution

The third proportional to 687.09 and 1,017.84 is: 1,507.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.09 : 1,017.84 = 1,017.84 : x
  2. Step 2: Convert to fraction form
    687.09/1,017.84 = 1,017.84/x
  3. Step 3: Cross multiply
    687.09x = 1,017.84 × 1,017.84
  4. Step 4: Simplify right side
    687.09x = 1,036,005.90
  5. Step 5: Solve for x
    x = 1,036,005.90/687.09
  6. Step 6: Final answer
    x = 1,507.81

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.