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Finding the Fourth Proportional to 2,720.88, 3,754.88 and 1,478.88

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Solution

The fourth proportional to 2,720.88, 3,754.88 and 1,478.88 is: 2,040.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.88 : 3,754.88 = 1,478.88 : x
  2. Step 2: Convert to fraction form
    2,720.88/3,754.88 = 1,478.88/x
  3. Step 3: Cross multiply
    2,720.88x = 3,754.88 × 1,478.88
  4. Step 4: Simplify right side
    2,720.88x = 5,553,016.93
  5. Step 5: Solve for x
    x = 5,553,016.93/2,720.88
  6. Step 6: Final answer
    x = 2,040.89

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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.