Home / 2,220.02-3,328.80-920.78

Finding the Fourth Proportional to 2,220.02, 3,328.80 and 920.78

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Solution

The fourth proportional to 2,220.02, 3,328.80 and 920.78 is: 1,380.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.02 : 3,328.80 = 920.78 : x
  2. Step 2: Convert to fraction form
    2,220.02/3,328.80 = 920.78/x
  3. Step 3: Cross multiply
    2,220.02x = 3,328.80 × 920.78
  4. Step 4: Simplify right side
    2,220.02x = 3,065,092.46
  5. Step 5: Solve for x
    x = 3,065,092.46/2,220.02
  6. Step 6: Final answer
    x = 1,380.66

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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.