Home / 2,213.36-3,320.73-1,238.78

Finding the Fourth Proportional to 2,213.36, 3,320.73 and 1,238.78

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Solution

The fourth proportional to 2,213.36, 3,320.73 and 1,238.78 is: 1,858.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.36 : 3,320.73 = 1,238.78 : x
  2. Step 2: Convert to fraction form
    2,213.36/3,320.73 = 1,238.78/x
  3. Step 3: Cross multiply
    2,213.36x = 3,320.73 × 1,238.78
  4. Step 4: Simplify right side
    2,213.36x = 4,113,653.91
  5. Step 5: Solve for x
    x = 4,113,653.91/2,213.36
  6. Step 6: Final answer
    x = 1,858.56

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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.