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Finding the Fourth Proportional to 2,188.92, 3,280.48 and 889.68

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Solution

The fourth proportional to 2,188.92, 3,280.48 and 889.68 is: 1,333.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.92 : 3,280.48 = 889.68 : x
  2. Step 2: Convert to fraction form
    2,188.92/3,280.48 = 889.68/x
  3. Step 3: Cross multiply
    2,188.92x = 3,280.48 × 889.68
  4. Step 4: Simplify right side
    2,188.92x = 2,918,577.45
  5. Step 5: Solve for x
    x = 2,918,577.45/2,188.92
  6. Step 6: Final answer
    x = 1,333.34

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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.