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Finding the Fourth Proportional to 2,153.44, 3,230.97 and 855.82

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Solution

The fourth proportional to 2,153.44, 3,230.97 and 855.82 is: 1,284.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.44 : 3,230.97 = 855.82 : x
  2. Step 2: Convert to fraction form
    2,153.44/3,230.97 = 855.82/x
  3. Step 3: Cross multiply
    2,153.44x = 3,230.97 × 855.82
  4. Step 4: Simplify right side
    2,153.44x = 2,765,128.75
  5. Step 5: Solve for x
    x = 2,765,128.75/2,153.44
  6. Step 6: Final answer
    x = 1,284.05

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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.