Home / 2,216.65-3,058.95-1,221.91

Finding the Fourth Proportional to 2,216.65, 3,058.95 and 1,221.91

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Solution

The fourth proportional to 2,216.65, 3,058.95 and 1,221.91 is: 1,686.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.65 : 3,058.95 = 1,221.91 : x
  2. Step 2: Convert to fraction form
    2,216.65/3,058.95 = 1,221.91/x
  3. Step 3: Cross multiply
    2,216.65x = 3,058.95 × 1,221.91
  4. Step 4: Simplify right side
    2,216.65x = 3,737,753.57
  5. Step 5: Solve for x
    x = 3,737,753.57/2,216.65
  6. Step 6: Final answer
    x = 1,686.22

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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.