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Finding the Fourth Proportional to 3,839.68, 5,756.18 and 1,989.82

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Solution

The fourth proportional to 3,839.68, 5,756.18 and 1,989.82 is: 2,983.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,839.68 : 5,756.18 = 1,989.82 : x
  2. Step 2: Convert to fraction form
    3,839.68/5,756.18 = 1,989.82/x
  3. Step 3: Cross multiply
    3,839.68x = 5,756.18 × 1,989.82
  4. Step 4: Simplify right side
    3,839.68x = 11,453,762.09
  5. Step 5: Solve for x
    x = 11,453,762.09/3,839.68
  6. Step 6: Final answer
    x = 2,983.00

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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.