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Finding the Fourth Proportional to 6,400.80, 9,600.80 and 2,891.07

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Solution

The fourth proportional to 6,400.80, 9,600.80 and 2,891.07 is: 4,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,400.80 : 9,600.80 = 2,891.07 : x
  2. Step 2: Convert to fraction form
    6,400.80/9,600.80 = 2,891.07/x
  3. Step 3: Cross multiply
    6,400.80x = 9,600.80 × 2,891.07
  4. Step 4: Simplify right side
    6,400.80x = 27,756,570.40
  5. Step 5: Solve for x
    x = 27,756,570.40/6,400.80
  6. Step 6: Final answer
    x = 4,336.42

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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.