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Finding the Fourth Proportional to 2,486.26, 3,729.80 and 843

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Solution

The fourth proportional to 2,486.26, 3,729.80 and 843 is: 1,264.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.26 : 3,729.80 = 843 : x
  2. Step 2: Convert to fraction form
    2,486.26/3,729.80 = 843/x
  3. Step 3: Cross multiply
    2,486.26x = 3,729.80 × 843
  4. Step 4: Simplify right side
    2,486.26x = 3,144,221.40
  5. Step 5: Solve for x
    x = 3,144,221.40/2,486.26
  6. Step 6: Final answer
    x = 1,264.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.