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Finding the Fourth Proportional to 4,426.80, 6,640.20 and 3,811.20

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Solution

The fourth proportional to 4,426.80, 6,640.20 and 3,811.20 is: 5,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,426.80 : 6,640.20 = 3,811.20 : x
  2. Step 2: Convert to fraction form
    4,426.80/6,640.20 = 3,811.20/x
  3. Step 3: Cross multiply
    4,426.80x = 6,640.20 × 3,811.20
  4. Step 4: Simplify right side
    4,426.80x = 25,307,130.24
  5. Step 5: Solve for x
    x = 25,307,130.24/4,426.80
  6. Step 6: Final answer
    x = 5,716.80

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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.