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Finding the Fourth Proportional to 2,189.88, 3,283.61 and 889.83

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Solution

The fourth proportional to 2,189.88, 3,283.61 and 889.83 is: 1,334.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.88 : 3,283.61 = 889.83 : x
  2. Step 2: Convert to fraction form
    2,189.88/3,283.61 = 889.83/x
  3. Step 3: Cross multiply
    2,189.88x = 3,283.61 × 889.83
  4. Step 4: Simplify right side
    2,189.88x = 2,921,850.24
  5. Step 5: Solve for x
    x = 2,921,850.24/2,189.88
  6. Step 6: Final answer
    x = 1,334.25

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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.