Home / 2,216.46-3,058.80-1,221.78

Finding the Fourth Proportional to 2,216.46, 3,058.80 and 1,221.78

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Solution

The fourth proportional to 2,216.46, 3,058.80 and 1,221.78 is: 1,686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.46 : 3,058.80 = 1,221.78 : x
  2. Step 2: Convert to fraction form
    2,216.46/3,058.80 = 1,221.78/x
  3. Step 3: Cross multiply
    2,216.46x = 3,058.80 × 1,221.78
  4. Step 4: Simplify right side
    2,216.46x = 3,737,180.66
  5. Step 5: Solve for x
    x = 3,737,180.66/2,216.46
  6. Step 6: Final answer
    x = 1,686.10

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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.