Home / 2,216.45-3,058.68-1,221.71

Finding the Fourth Proportional to 2,216.45, 3,058.68 and 1,221.71

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Solution

The fourth proportional to 2,216.45, 3,058.68 and 1,221.71 is: 1,685.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.45 : 3,058.68 = 1,221.71 : x
  2. Step 2: Convert to fraction form
    2,216.45/3,058.68 = 1,221.71/x
  3. Step 3: Cross multiply
    2,216.45x = 3,058.68 × 1,221.71
  4. Step 4: Simplify right side
    2,216.45x = 3,736,819.94
  5. Step 5: Solve for x
    x = 3,736,819.94/2,216.45
  6. Step 6: Final answer
    x = 1,685.95

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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.