Home / 2,232.90-3,081.34-1,288.68

Finding the Fourth Proportional to 2,232.90, 3,081.34 and 1,288.68

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Solution

The fourth proportional to 2,232.90, 3,081.34 and 1,288.68 is: 1,778.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,232.90 : 3,081.34 = 1,288.68 : x
  2. Step 2: Convert to fraction form
    2,232.90/3,081.34 = 1,288.68/x
  3. Step 3: Cross multiply
    2,232.90x = 3,081.34 × 1,288.68
  4. Step 4: Simplify right side
    2,232.90x = 3,970,861.23
  5. Step 5: Solve for x
    x = 3,970,861.23/2,232.90
  6. Step 6: Final answer
    x = 1,778.34

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.