Home / 2,213.60-3,320.40-1,392.80

Finding the Fourth Proportional to 2,213.60, 3,320.40 and 1,392.80

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Solution

The fourth proportional to 2,213.60, 3,320.40 and 1,392.80 is: 2,089.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.60 : 3,320.40 = 1,392.80 : x
  2. Step 2: Convert to fraction form
    2,213.60/3,320.40 = 1,392.80/x
  3. Step 3: Cross multiply
    2,213.60x = 3,320.40 × 1,392.80
  4. Step 4: Simplify right side
    2,213.60x = 4,624,653.12
  5. Step 5: Solve for x
    x = 4,624,653.12/2,213.60
  6. Step 6: Final answer
    x = 2,089.20

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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.