Home / 3,931.20-5,896.80-2,199.60

Finding the Fourth Proportional to 3,931.20, 5,896.80 and 2,199.60

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Solution

The fourth proportional to 3,931.20, 5,896.80 and 2,199.60 is: 3,299.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.20 : 5,896.80 = 2,199.60 : x
  2. Step 2: Convert to fraction form
    3,931.20/5,896.80 = 2,199.60/x
  3. Step 3: Cross multiply
    3,931.20x = 5,896.80 × 2,199.60
  4. Step 4: Simplify right side
    3,931.20x = 12,970,601.28
  5. Step 5: Solve for x
    x = 12,970,601.28/3,931.20
  6. Step 6: Final answer
    x = 3,299.40

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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.