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Finding the Fourth Proportional to 1,839.68, 2,757.85 and 668.86

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Solution

The fourth proportional to 1,839.68, 2,757.85 and 668.86 is: 1,002.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.68 : 2,757.85 = 668.86 : x
  2. Step 2: Convert to fraction form
    1,839.68/2,757.85 = 668.86/x
  3. Step 3: Cross multiply
    1,839.68x = 2,757.85 × 668.86
  4. Step 4: Simplify right side
    1,839.68x = 1,844,611.57
  5. Step 5: Solve for x
    x = 1,844,611.57/1,839.68
  6. Step 6: Final answer
    x = 1,002.68

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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.