Home / 2,163.20-3,244.80-777.20

Finding the Fourth Proportional to 2,163.20, 3,244.80 and 777.20

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Solution

The fourth proportional to 2,163.20, 3,244.80 and 777.20 is: 1,165.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.20 : 3,244.80 = 777.20 : x
  2. Step 2: Convert to fraction form
    2,163.20/3,244.80 = 777.20/x
  3. Step 3: Cross multiply
    2,163.20x = 3,244.80 × 777.20
  4. Step 4: Simplify right side
    2,163.20x = 2,521,858.56
  5. Step 5: Solve for x
    x = 2,521,858.56/2,163.20
  6. Step 6: Final answer
    x = 1,165.80

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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.