Home / 2,816.40-4,219.20-1,660.80

Finding the Fourth Proportional to 2,816.40, 4,219.20 and 1,660.80

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Solution

The fourth proportional to 2,816.40, 4,219.20 and 1,660.80 is: 2,488.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.40 : 4,219.20 = 1,660.80 : x
  2. Step 2: Convert to fraction form
    2,816.40/4,219.20 = 1,660.80/x
  3. Step 3: Cross multiply
    2,816.40x = 4,219.20 × 1,660.80
  4. Step 4: Simplify right side
    2,816.40x = 7,007,247.36
  5. Step 5: Solve for x
    x = 7,007,247.36/2,816.40
  6. Step 6: Final answer
    x = 2,488.02

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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.