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Finding the Fourth Proportional to 1,751.87, 2,626.22 and 640.49

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Solution

The fourth proportional to 1,751.87, 2,626.22 and 640.49 is: 960.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.87 : 2,626.22 = 640.49 : x
  2. Step 2: Convert to fraction form
    1,751.87/2,626.22 = 640.49/x
  3. Step 3: Cross multiply
    1,751.87x = 2,626.22 × 640.49
  4. Step 4: Simplify right side
    1,751.87x = 1,682,081.97
  5. Step 5: Solve for x
    x = 1,682,081.97/1,751.87
  6. Step 6: Final answer
    x = 960.17

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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.