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Finding the Third Proportional to 688.13 and 945.56

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Solution

The third proportional to 688.13 and 945.56 is: 1,299.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.13 : 945.56 = 945.56 : x
  2. Step 2: Convert to fraction form
    688.13/945.56 = 945.56/x
  3. Step 3: Cross multiply
    688.13x = 945.56 × 945.56
  4. Step 4: Simplify right side
    688.13x = 894,088.44
  5. Step 5: Solve for x
    x = 894,088.44/688.13
  6. Step 6: Final answer
    x = 1,299.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.