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Finding the Fourth Proportional to 2,188.79, 3,283.39 and 872.22

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Solution

The fourth proportional to 2,188.79, 3,283.39 and 872.22 is: 1,308.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.79 : 3,283.39 = 872.22 : x
  2. Step 2: Convert to fraction form
    2,188.79/3,283.39 = 872.22/x
  3. Step 3: Cross multiply
    2,188.79x = 3,283.39 × 872.22
  4. Step 4: Simplify right side
    2,188.79x = 2,863,838.43
  5. Step 5: Solve for x
    x = 2,863,838.43/2,188.79
  6. Step 6: Final answer
    x = 1,308.41

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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.