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Finding the Third Proportional to 555.05 and 606.80

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Solution

The third proportional to 555.05 and 606.80 is: 663.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.05 : 606.80 = 606.80 : x
  2. Step 2: Convert to fraction form
    555.05/606.80 = 606.80/x
  3. Step 3: Cross multiply
    555.05x = 606.80 × 606.80
  4. Step 4: Simplify right side
    555.05x = 368,202.45
  5. Step 5: Solve for x
    x = 368,202.45/555.05
  6. Step 6: Final answer
    x = 663.37

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.