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Finding the Fourth Proportional to 2,153.76, 3,232.20 and 855.28

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Solution

The fourth proportional to 2,153.76, 3,232.20 and 855.28 is: 1,283.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.76 : 3,232.20 = 855.28 : x
  2. Step 2: Convert to fraction form
    2,153.76/3,232.20 = 855.28/x
  3. Step 3: Cross multiply
    2,153.76x = 3,232.20 × 855.28
  4. Step 4: Simplify right side
    2,153.76x = 2,764,436.02
  5. Step 5: Solve for x
    x = 2,764,436.02/2,153.76
  6. Step 6: Final answer
    x = 1,283.54

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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.