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Finding the Third Proportional to 579 and 909.75

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Solution

The third proportional to 579 and 909.75 is: 1,429.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    579 : 909.75 = 909.75 : x
  2. Step 2: Convert to fraction form
    579/909.75 = 909.75/x
  3. Step 3: Cross multiply
    579x = 909.75 × 909.75
  4. Step 4: Simplify right side
    579x = 827,645.06
  5. Step 5: Solve for x
    x = 827,645.06/579
  6. Step 6: Final answer
    x = 1,429.44

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.