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Finding the Fourth Proportional to 3,720.97, 5,581.15 and 1,255.73

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Solution

The fourth proportional to 3,720.97, 5,581.15 and 1,255.73 is: 1,883.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.97 : 5,581.15 = 1,255.73 : x
  2. Step 2: Convert to fraction form
    3,720.97/5,581.15 = 1,255.73/x
  3. Step 3: Cross multiply
    3,720.97x = 5,581.15 × 1,255.73
  4. Step 4: Simplify right side
    3,720.97x = 7,008,428.30
  5. Step 5: Solve for x
    x = 7,008,428.30/3,720.97
  6. Step 6: Final answer
    x = 1,883.50

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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.