Home / 2,439.20-3,368.40-2,208.80

Finding the Fourth Proportional to 2,439.20, 3,368.40 and 2,208.80

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Solution

The fourth proportional to 2,439.20, 3,368.40 and 2,208.80 is: 3,050.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,439.20 : 3,368.40 = 2,208.80 : x
  2. Step 2: Convert to fraction form
    2,439.20/3,368.40 = 2,208.80/x
  3. Step 3: Cross multiply
    2,439.20x = 3,368.40 × 2,208.80
  4. Step 4: Simplify right side
    2,439.20x = 7,440,121.92
  5. Step 5: Solve for x
    x = 7,440,121.92/2,439.20
  6. Step 6: Final answer
    x = 3,050.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.