Home / 2,220.80-3,331.20-577.21

Finding the Fourth Proportional to 2,220.80, 3,331.20 and 577.21

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Solution

The fourth proportional to 2,220.80, 3,331.20 and 577.21 is: 865.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.80 : 3,331.20 = 577.21 : x
  2. Step 2: Convert to fraction form
    2,220.80/3,331.20 = 577.21/x
  3. Step 3: Cross multiply
    2,220.80x = 3,331.20 × 577.21
  4. Step 4: Simplify right side
    2,220.80x = 1,922,801.95
  5. Step 5: Solve for x
    x = 1,922,801.95/2,220.80
  6. Step 6: Final answer
    x = 865.82

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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.