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Finding the Fourth Proportional to 2,720.39, 3,754.20 and 1,478.39

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Solution

The fourth proportional to 2,720.39, 3,754.20 and 1,478.39 is: 2,040.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.39 : 3,754.20 = 1,478.39 : x
  2. Step 2: Convert to fraction form
    2,720.39/3,754.20 = 1,478.39/x
  3. Step 3: Cross multiply
    2,720.39x = 3,754.20 × 1,478.39
  4. Step 4: Simplify right side
    2,720.39x = 5,550,171.74
  5. Step 5: Solve for x
    x = 5,550,171.74/2,720.39
  6. Step 6: Final answer
    x = 2,040.21

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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.