Home / 2,213.90-3,320.82-1,288.97

Finding the Fourth Proportional to 2,213.90, 3,320.82 and 1,288.97

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Solution

The fourth proportional to 2,213.90, 3,320.82 and 1,288.97 is: 1,933.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.90 : 3,320.82 = 1,288.97 : x
  2. Step 2: Convert to fraction form
    2,213.90/3,320.82 = 1,288.97/x
  3. Step 3: Cross multiply
    2,213.90x = 3,320.82 × 1,288.97
  4. Step 4: Simplify right side
    2,213.90x = 4,280,437.36
  5. Step 5: Solve for x
    x = 4,280,437.36/2,213.90
  6. Step 6: Final answer
    x = 1,933.44

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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.