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Finding the Fourth Proportional to 2,220.71, 3,329.90 and 660.50

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Solution

The fourth proportional to 2,220.71, 3,329.90 and 660.50 is: 990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.71 : 3,329.90 = 660.50 : x
  2. Step 2: Convert to fraction form
    2,220.71/3,329.90 = 660.50/x
  3. Step 3: Cross multiply
    2,220.71x = 3,329.90 × 660.50
  4. Step 4: Simplify right side
    2,220.71x = 2,199,393.96
  5. Step 5: Solve for x
    x = 2,199,393.96/2,220.71
  6. Step 6: Final answer
    x = 990.40

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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.