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Finding the Fourth Proportional to 3,720.87, 5,581.37 and 1,529.11

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Solution

The fourth proportional to 3,720.87, 5,581.37 and 1,529.11 is: 2,293.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.87 : 5,581.37 = 1,529.11 : x
  2. Step 2: Convert to fraction form
    3,720.87/5,581.37 = 1,529.11/x
  3. Step 3: Cross multiply
    3,720.87x = 5,581.37 × 1,529.11
  4. Step 4: Simplify right side
    3,720.87x = 8,534,539.48
  5. Step 5: Solve for x
    x = 8,534,539.48/3,720.87
  6. Step 6: Final answer
    x = 2,293.69

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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.