Home / 2,220.90-3,330.79-660.56

Finding the Fourth Proportional to 2,220.90, 3,330.79 and 660.56

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Solution

The fourth proportional to 2,220.90, 3,330.79 and 660.56 is: 990.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.90 : 3,330.79 = 660.56 : x
  2. Step 2: Convert to fraction form
    2,220.90/3,330.79 = 660.56/x
  3. Step 3: Cross multiply
    2,220.90x = 3,330.79 × 660.56
  4. Step 4: Simplify right side
    2,220.90x = 2,200,168.34
  5. Step 5: Solve for x
    x = 2,200,168.34/2,220.90
  6. Step 6: Final answer
    x = 990.66

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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.