Home / 2,215.99-3,058.05-1,221.28

Finding the Fourth Proportional to 2,215.99, 3,058.05 and 1,221.28

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Solution

The fourth proportional to 2,215.99, 3,058.05 and 1,221.28 is: 1,685.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.99 : 3,058.05 = 1,221.28 : x
  2. Step 2: Convert to fraction form
    2,215.99/3,058.05 = 1,221.28/x
  3. Step 3: Cross multiply
    2,215.99x = 3,058.05 × 1,221.28
  4. Step 4: Simplify right side
    2,215.99x = 3,734,735.30
  5. Step 5: Solve for x
    x = 3,734,735.30/2,215.99
  6. Step 6: Final answer
    x = 1,685.36

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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.