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Finding the Fourth Proportional to 885.75, 1,319.27 and 839.49

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Solution

The fourth proportional to 885.75, 1,319.27 and 839.49 is: 1,250.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.75 : 1,319.27 = 839.49 : x
  2. Step 2: Convert to fraction form
    885.75/1,319.27 = 839.49/x
  3. Step 3: Cross multiply
    885.75x = 1,319.27 × 839.49
  4. Step 4: Simplify right side
    885.75x = 1,107,513.97
  5. Step 5: Solve for x
    x = 1,107,513.97/885.75
  6. Step 6: Final answer
    x = 1,250.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.