Home / 2,216.20-3,058.17-1,221.45

Finding the Fourth Proportional to 2,216.20, 3,058.17 and 1,221.45

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Solution

The fourth proportional to 2,216.20, 3,058.17 and 1,221.45 is: 1,685.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.20 : 3,058.17 = 1,221.45 : x
  2. Step 2: Convert to fraction form
    2,216.20/3,058.17 = 1,221.45/x
  3. Step 3: Cross multiply
    2,216.20x = 3,058.17 × 1,221.45
  4. Step 4: Simplify right side
    2,216.20x = 3,735,392.57
  5. Step 5: Solve for x
    x = 3,735,392.57/2,216.20
  6. Step 6: Final answer
    x = 1,685.49

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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.