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Finding the Third Proportional to 279 and 571.50

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Solution

The third proportional to 279 and 571.50 is: 1,170.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 571.50 = 571.50 : x
  2. Step 2: Convert to fraction form
    279/571.50 = 571.50/x
  3. Step 3: Cross multiply
    279x = 571.50 × 571.50
  4. Step 4: Simplify right side
    279x = 326,612.25
  5. Step 5: Solve for x
    x = 326,612.25/279
  6. Step 6: Final answer
    x = 1,170.65

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.