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Finding the Fourth Proportional to 2,721.49, 4,081.90 and 747.28

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Solution

The fourth proportional to 2,721.49, 4,081.90 and 747.28 is: 1,120.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.49 : 4,081.90 = 747.28 : x
  2. Step 2: Convert to fraction form
    2,721.49/4,081.90 = 747.28/x
  3. Step 3: Cross multiply
    2,721.49x = 4,081.90 × 747.28
  4. Step 4: Simplify right side
    2,721.49x = 3,050,322.23
  5. Step 5: Solve for x
    x = 3,050,322.23/2,721.49
  6. Step 6: Final answer
    x = 1,120.83

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1.5x scale

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.