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Finding the Fourth Proportional to 2,721.62, 3,759.63 and 2,620.47

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Solution

The fourth proportional to 2,721.62, 3,759.63 and 2,620.47 is: 3,619.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.62 : 3,759.63 = 2,620.47 : x
  2. Step 2: Convert to fraction form
    2,721.62/3,759.63 = 2,620.47/x
  3. Step 3: Cross multiply
    2,721.62x = 3,759.63 × 2,620.47
  4. Step 4: Simplify right side
    2,721.62x = 9,851,997.63
  5. Step 5: Solve for x
    x = 9,851,997.63/2,721.62
  6. Step 6: Final answer
    x = 3,619.90

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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.