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Finding the Fourth Proportional to 2,187.86, 3,281.85 and 889.43

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Solution

The fourth proportional to 2,187.86, 3,281.85 and 889.43 is: 1,334.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.86 : 3,281.85 = 889.43 : x
  2. Step 2: Convert to fraction form
    2,187.86/3,281.85 = 889.43/x
  3. Step 3: Cross multiply
    2,187.86x = 3,281.85 × 889.43
  4. Step 4: Simplify right side
    2,187.86x = 2,918,959.44
  5. Step 5: Solve for x
    x = 2,918,959.44/2,187.86
  6. Step 6: Final answer
    x = 1,334.16

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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.