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Finding the Fourth Proportional to 2,486.88, 3,728.96 and 843.60

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Solution

The fourth proportional to 2,486.88, 3,728.96 and 843.60 is: 1,264.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.88 : 3,728.96 = 843.60 : x
  2. Step 2: Convert to fraction form
    2,486.88/3,728.96 = 843.60/x
  3. Step 3: Cross multiply
    2,486.88x = 3,728.96 × 843.60
  4. Step 4: Simplify right side
    2,486.88x = 3,145,746.44
  5. Step 5: Solve for x
    x = 3,145,746.44/2,486.88
  6. Step 6: Final answer
    x = 1,264.94

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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.