Home / 2,216.38-3,058.64-1,221.76

Finding the Fourth Proportional to 2,216.38, 3,058.64 and 1,221.76

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Solution

The fourth proportional to 2,216.38, 3,058.64 and 1,221.76 is: 1,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.38 : 3,058.64 = 1,221.76 : x
  2. Step 2: Convert to fraction form
    2,216.38/3,058.64 = 1,221.76/x
  3. Step 3: Cross multiply
    2,216.38x = 3,058.64 × 1,221.76
  4. Step 4: Simplify right side
    2,216.38x = 3,736,924.01
  5. Step 5: Solve for x
    x = 3,736,924.01/2,216.38
  6. Step 6: Final answer
    x = 1,686.05

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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.