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Finding the Third Proportional to 772.03 and 981.42

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Solution

The third proportional to 772.03 and 981.42 is: 1,247.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.03 : 981.42 = 981.42 : x
  2. Step 2: Convert to fraction form
    772.03/981.42 = 981.42/x
  3. Step 3: Cross multiply
    772.03x = 981.42 × 981.42
  4. Step 4: Simplify right side
    772.03x = 963,188.90
  5. Step 5: Solve for x
    x = 963,188.90/772.03
  6. Step 6: Final answer
    x = 1,247.60

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.