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Finding the Fourth Proportional to 939.33, 1,296.25 and 519.67

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Solution

The fourth proportional to 939.33, 1,296.25 and 519.67 is: 717.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.33 : 1,296.25 = 519.67 : x
  2. Step 2: Convert to fraction form
    939.33/1,296.25 = 519.67/x
  3. Step 3: Cross multiply
    939.33x = 1,296.25 × 519.67
  4. Step 4: Simplify right side
    939.33x = 673,614.90
  5. Step 5: Solve for x
    x = 673,614.90/939.33
  6. Step 6: Final answer
    x = 717.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.