Home / 2,216.58-3,058.85-1,221.86

Finding the Fourth Proportional to 2,216.58, 3,058.85 and 1,221.86

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Solution

The fourth proportional to 2,216.58, 3,058.85 and 1,221.86 is: 1,686.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.58 : 3,058.85 = 1,221.86 : x
  2. Step 2: Convert to fraction form
    2,216.58/3,058.85 = 1,221.86/x
  3. Step 3: Cross multiply
    2,216.58x = 3,058.85 × 1,221.86
  4. Step 4: Simplify right side
    2,216.58x = 3,737,465.06
  5. Step 5: Solve for x
    x = 3,737,465.06/2,216.58
  6. Step 6: Final answer
    x = 1,686.14

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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.