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Finding the Fourth Proportional to 3,909.87, 5,860.70 and 1,443.12

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Solution

The fourth proportional to 3,909.87, 5,860.70 and 1,443.12 is: 2,163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.87 : 5,860.70 = 1,443.12 : x
  2. Step 2: Convert to fraction form
    3,909.87/5,860.70 = 1,443.12/x
  3. Step 3: Cross multiply
    3,909.87x = 5,860.70 × 1,443.12
  4. Step 4: Simplify right side
    3,909.87x = 8,457,686.17
  5. Step 5: Solve for x
    x = 8,457,686.17/3,909.87
  6. Step 6: Final answer
    x = 2,163.16

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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.