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Finding the Fourth Proportional to 3,759.03, 5,640.31 and 1,678.84

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Solution

The fourth proportional to 3,759.03, 5,640.31 and 1,678.84 is: 2,519.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,759.03 : 5,640.31 = 1,678.84 : x
  2. Step 2: Convert to fraction form
    3,759.03/5,640.31 = 1,678.84/x
  3. Step 3: Cross multiply
    3,759.03x = 5,640.31 × 1,678.84
  4. Step 4: Simplify right side
    3,759.03x = 9,469,178.04
  5. Step 5: Solve for x
    x = 9,469,178.04/3,759.03
  6. Step 6: Final answer
    x = 2,519.05

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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.