Home / 2,220.30-3,331.92-921.77

Finding the Fourth Proportional to 2,220.30, 3,331.92 and 921.77

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Solution

The fourth proportional to 2,220.30, 3,331.92 and 921.77 is: 1,383.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.30 : 3,331.92 = 921.77 : x
  2. Step 2: Convert to fraction form
    2,220.30/3,331.92 = 921.77/x
  3. Step 3: Cross multiply
    2,220.30x = 3,331.92 × 921.77
  4. Step 4: Simplify right side
    2,220.30x = 3,071,263.90
  5. Step 5: Solve for x
    x = 3,071,263.90/2,220.30
  6. Step 6: Final answer
    x = 1,383.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.