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Finding the Fourth Proportional to 2,220.63, 3,331.59 and 660.64

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Solution

The fourth proportional to 2,220.63, 3,331.59 and 660.64 is: 991.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.63 : 3,331.59 = 660.64 : x
  2. Step 2: Convert to fraction form
    2,220.63/3,331.59 = 660.64/x
  3. Step 3: Cross multiply
    2,220.63x = 3,331.59 × 660.64
  4. Step 4: Simplify right side
    2,220.63x = 2,200,981.62
  5. Step 5: Solve for x
    x = 2,200,981.62/2,220.63
  6. Step 6: Final answer
    x = 991.15

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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.