Home / 2,216.39-3,058.65-1,221.65

Finding the Fourth Proportional to 2,216.39, 3,058.65 and 1,221.65

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Solution

The fourth proportional to 2,216.39, 3,058.65 and 1,221.65 is: 1,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.39 : 3,058.65 = 1,221.65 : x
  2. Step 2: Convert to fraction form
    2,216.39/3,058.65 = 1,221.65/x
  3. Step 3: Cross multiply
    2,216.39x = 3,058.65 × 1,221.65
  4. Step 4: Simplify right side
    2,216.39x = 3,736,599.77
  5. Step 5: Solve for x
    x = 3,736,599.77/2,216.39
  6. Step 6: Final answer
    x = 1,685.90

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Half 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.