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Finding the Third Proportional to 279.66 and 604.78

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Solution

The third proportional to 279.66 and 604.78 is: 1,307.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.66 : 604.78 = 604.78 : x
  2. Step 2: Convert to fraction form
    279.66/604.78 = 604.78/x
  3. Step 3: Cross multiply
    279.66x = 604.78 × 604.78
  4. Step 4: Simplify right side
    279.66x = 365,760.36
  5. Step 5: Solve for x
    x = 365,760.36/279.66
  6. Step 6: Final answer
    x = 1,307.89

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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.