Home / 2,216.35-3,058.45-1,221.60

Finding the Fourth Proportional to 2,216.35, 3,058.45 and 1,221.60

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Solution

The fourth proportional to 2,216.35, 3,058.45 and 1,221.60 is: 1,685.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.35 : 3,058.45 = 1,221.60 : x
  2. Step 2: Convert to fraction form
    2,216.35/3,058.45 = 1,221.60/x
  3. Step 3: Cross multiply
    2,216.35x = 3,058.45 × 1,221.60
  4. Step 4: Simplify right side
    2,216.35x = 3,736,202.52
  5. Step 5: Solve for x
    x = 3,736,202.52/2,216.35
  6. Step 6: Final answer
    x = 1,685.75

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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.