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Finding the Third Proportional to 691.88 and 1,005.75

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Solution

The third proportional to 691.88 and 1,005.75 is: 1,462.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.88 : 1,005.75 = 1,005.75 : x
  2. Step 2: Convert to fraction form
    691.88/1,005.75 = 1,005.75/x
  3. Step 3: Cross multiply
    691.88x = 1,005.75 × 1,005.75
  4. Step 4: Simplify right side
    691.88x = 1,011,533.06
  5. Step 5: Solve for x
    x = 1,011,533.06/691.88
  6. Step 6: Final answer
    x = 1,462.02

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.