Home / 2,217.50-3,060.14-1,222.75

Finding the Fourth Proportional to 2,217.50, 3,060.14 and 1,222.75

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Solution

The fourth proportional to 2,217.50, 3,060.14 and 1,222.75 is: 1,687.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.50 : 3,060.14 = 1,222.75 : x
  2. Step 2: Convert to fraction form
    2,217.50/3,060.14 = 1,222.75/x
  3. Step 3: Cross multiply
    2,217.50x = 3,060.14 × 1,222.75
  4. Step 4: Simplify right side
    2,217.50x = 3,741,786.19
  5. Step 5: Solve for x
    x = 3,741,786.19/2,217.50
  6. Step 6: Final answer
    x = 1,687.39

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.