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Finding the Fourth Proportional to 2,721.87, 3,755.70 and 1,728.54

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Solution

The fourth proportional to 2,721.87, 3,755.70 and 1,728.54 is: 2,385.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.87 : 3,755.70 = 1,728.54 : x
  2. Step 2: Convert to fraction form
    2,721.87/3,755.70 = 1,728.54/x
  3. Step 3: Cross multiply
    2,721.87x = 3,755.70 × 1,728.54
  4. Step 4: Simplify right side
    2,721.87x = 6,491,877.68
  5. Step 5: Solve for x
    x = 6,491,877.68/2,721.87
  6. Step 6: Final answer
    x = 2,385.08

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1.5x scale

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.