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Finding the Fourth Proportional to 937.74, 1,294.44 and 839.31

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Solution

The fourth proportional to 937.74, 1,294.44 and 839.31 is: 1,158.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.74 : 1,294.44 = 839.31 : x
  2. Step 2: Convert to fraction form
    937.74/1,294.44 = 839.31/x
  3. Step 3: Cross multiply
    937.74x = 1,294.44 × 839.31
  4. Step 4: Simplify right side
    937.74x = 1,086,436.44
  5. Step 5: Solve for x
    x = 1,086,436.44/937.74
  6. Step 6: Final answer
    x = 1,158.57

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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.