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Finding the Fourth Proportional to 4,276.80, 6,418.80 and 2,816.64

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Solution

The fourth proportional to 4,276.80, 6,418.80 and 2,816.64 is: 4,227.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,276.80 : 6,418.80 = 2,816.64 : x
  2. Step 2: Convert to fraction form
    4,276.80/6,418.80 = 2,816.64/x
  3. Step 3: Cross multiply
    4,276.80x = 6,418.80 × 2,816.64
  4. Step 4: Simplify right side
    4,276.80x = 18,079,448.83
  5. Step 5: Solve for x
    x = 18,079,448.83/4,276.80
  6. Step 6: Final answer
    x = 4,227.33

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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.