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Finding the Fourth Proportional to 2,220.84, 3,330.96 and 660.81

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Solution

The fourth proportional to 2,220.84, 3,330.96 and 660.81 is: 991.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.84 : 3,330.96 = 660.81 : x
  2. Step 2: Convert to fraction form
    2,220.84/3,330.96 = 660.81/x
  3. Step 3: Cross multiply
    2,220.84x = 3,330.96 × 660.81
  4. Step 4: Simplify right side
    2,220.84x = 2,201,131.68
  5. Step 5: Solve for x
    x = 2,201,131.68/2,220.84
  6. Step 6: Final answer
    x = 991.13

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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.