Home / 2,213.78-3,320.67-674.78

Finding the Fourth Proportional to 2,213.78, 3,320.67 and 674.78

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Solution

The fourth proportional to 2,213.78, 3,320.67 and 674.78 is: 1,012.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.78 : 3,320.67 = 674.78 : x
  2. Step 2: Convert to fraction form
    2,213.78/3,320.67 = 674.78/x
  3. Step 3: Cross multiply
    2,213.78x = 3,320.67 × 674.78
  4. Step 4: Simplify right side
    2,213.78x = 2,240,721.70
  5. Step 5: Solve for x
    x = 2,240,721.70/2,213.78
  6. Step 6: Final answer
    x = 1,012.17

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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.