Home / 2,212.09-3,319.50-1,288.06

Finding the Fourth Proportional to 2,212.09, 3,319.50 and 1,288.06

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Solution

The fourth proportional to 2,212.09, 3,319.50 and 1,288.06 is: 1,932.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.09 : 3,319.50 = 1,288.06 : x
  2. Step 2: Convert to fraction form
    2,212.09/3,319.50 = 1,288.06/x
  3. Step 3: Cross multiply
    2,212.09x = 3,319.50 × 1,288.06
  4. Step 4: Simplify right side
    2,212.09x = 4,275,715.17
  5. Step 5: Solve for x
    x = 4,275,715.17/2,212.09
  6. Step 6: Final answer
    x = 1,932.88

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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.