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Finding the Fourth Proportional to 3,769.99, 5,632.67 and 3,640.79

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Solution

The fourth proportional to 3,769.99, 5,632.67 and 3,640.79 is: 5,439.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,769.99 : 5,632.67 = 3,640.79 : x
  2. Step 2: Convert to fraction form
    3,769.99/5,632.67 = 3,640.79/x
  3. Step 3: Cross multiply
    3,769.99x = 5,632.67 × 3,640.79
  4. Step 4: Simplify right side
    3,769.99x = 20,507,391.79
  5. Step 5: Solve for x
    x = 20,507,391.79/3,769.99
  6. Step 6: Final answer
    x = 5,439.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.