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Finding the Third Proportional to 659.81 and 992.39

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Solution

The third proportional to 659.81 and 992.39 is: 1,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.81 : 992.39 = 992.39 : x
  2. Step 2: Convert to fraction form
    659.81/992.39 = 992.39/x
  3. Step 3: Cross multiply
    659.81x = 992.39 × 992.39
  4. Step 4: Simplify right side
    659.81x = 984,839.15
  5. Step 5: Solve for x
    x = 984,839.15/659.81
  6. Step 6: Final answer
    x = 1,492.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.