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Finding the Fourth Proportional to 939.17, 1,296.05 and 519.53

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Solution

The fourth proportional to 939.17, 1,296.05 and 519.53 is: 716.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.17 : 1,296.05 = 519.53 : x
  2. Step 2: Convert to fraction form
    939.17/1,296.05 = 519.53/x
  3. Step 3: Cross multiply
    939.17x = 1,296.05 × 519.53
  4. Step 4: Simplify right side
    939.17x = 673,327.78
  5. Step 5: Solve for x
    x = 673,327.78/939.17
  6. Step 6: Final answer
    x = 716.94

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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.