Home / 2,220.42-3,331.29-660.47

Finding the Fourth Proportional to 2,220.42, 3,331.29 and 660.47

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Solution

The fourth proportional to 2,220.42, 3,331.29 and 660.47 is: 990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.42 : 3,331.29 = 660.47 : x
  2. Step 2: Convert to fraction form
    2,220.42/3,331.29 = 660.47/x
  3. Step 3: Cross multiply
    2,220.42x = 3,331.29 × 660.47
  4. Step 4: Simplify right side
    2,220.42x = 2,200,217.11
  5. Step 5: Solve for x
    x = 2,200,217.11/2,220.42
  6. Step 6: Final answer
    x = 990.90

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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.