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Finding the Fourth Proportional to 1,751.23, 2,625.99 and 640.61

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Solution

The fourth proportional to 1,751.23, 2,625.99 and 640.61 is: 960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.23 : 2,625.99 = 640.61 : x
  2. Step 2: Convert to fraction form
    1,751.23/2,625.99 = 640.61/x
  3. Step 3: Cross multiply
    1,751.23x = 2,625.99 × 640.61
  4. Step 4: Simplify right side
    1,751.23x = 1,682,235.45
  5. Step 5: Solve for x
    x = 1,682,235.45/1,751.23
  6. Step 6: Final answer
    x = 960.60

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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.