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Finding the Fourth Proportional to 2,640.44, 3,960.12 and 1,668.44

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Solution

The fourth proportional to 2,640.44, 3,960.12 and 1,668.44 is: 2,502.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.44 : 3,960.12 = 1,668.44 : x
  2. Step 2: Convert to fraction form
    2,640.44/3,960.12 = 1,668.44/x
  3. Step 3: Cross multiply
    2,640.44x = 3,960.12 × 1,668.44
  4. Step 4: Simplify right side
    2,640.44x = 6,607,222.61
  5. Step 5: Solve for x
    x = 6,607,222.61/2,640.44
  6. Step 6: Final answer
    x = 2,502.32

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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.