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Finding the Fourth Proportional to 2,721.80, 3,755.98 and 1,479.80

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Solution

The fourth proportional to 2,721.80, 3,755.98 and 1,479.80 is: 2,042.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.80 : 3,755.98 = 1,479.80 : x
  2. Step 2: Convert to fraction form
    2,721.80/3,755.98 = 1,479.80/x
  3. Step 3: Cross multiply
    2,721.80x = 3,755.98 × 1,479.80
  4. Step 4: Simplify right side
    2,721.80x = 5,558,099.20
  5. Step 5: Solve for x
    x = 5,558,099.20/2,721.80
  6. Step 6: Final answer
    x = 2,042.07

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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.