Home / 2,221.72-3,336.90-1,357.72

Finding the Fourth Proportional to 2,221.72, 3,336.90 and 1,357.72

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Solution

The fourth proportional to 2,221.72, 3,336.90 and 1,357.72 is: 2,039.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.72 : 3,336.90 = 1,357.72 : x
  2. Step 2: Convert to fraction form
    2,221.72/3,336.90 = 1,357.72/x
  3. Step 3: Cross multiply
    2,221.72x = 3,336.90 × 1,357.72
  4. Step 4: Simplify right side
    2,221.72x = 4,530,575.87
  5. Step 5: Solve for x
    x = 4,530,575.87/2,221.72
  6. Step 6: Final answer
    x = 2,039.22

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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.