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Finding the Third Proportional to 688.22 and 1,207.13

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Solution

The third proportional to 688.22 and 1,207.13 is: 2,117.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.22 : 1,207.13 = 1,207.13 : x
  2. Step 2: Convert to fraction form
    688.22/1,207.13 = 1,207.13/x
  3. Step 3: Cross multiply
    688.22x = 1,207.13 × 1,207.13
  4. Step 4: Simplify right side
    688.22x = 1,457,150.77
  5. Step 5: Solve for x
    x = 1,457,150.77/688.22
  6. Step 6: Final answer
    x = 2,117.28

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.