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Finding the Third Proportional to 280.88 and 606.56

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Solution

The third proportional to 280.88 and 606.56 is: 1,309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.88 : 606.56 = 606.56 : x
  2. Step 2: Convert to fraction form
    280.88/606.56 = 606.56/x
  3. Step 3: Cross multiply
    280.88x = 606.56 × 606.56
  4. Step 4: Simplify right side
    280.88x = 367,918.07
  5. Step 5: Solve for x
    x = 367,918.07/280.88
  6. Step 6: Final answer
    x = 1,309.90

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.