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Finding the Fourth Proportional to 2,563.68, 3,845.88 and 920.28

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Solution

The fourth proportional to 2,563.68, 3,845.88 and 920.28 is: 1,380.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,563.68 : 3,845.88 = 920.28 : x
  2. Step 2: Convert to fraction form
    2,563.68/3,845.88 = 920.28/x
  3. Step 3: Cross multiply
    2,563.68x = 3,845.88 × 920.28
  4. Step 4: Simplify right side
    2,563.68x = 3,539,286.45
  5. Step 5: Solve for x
    x = 3,539,286.45/2,563.68
  6. Step 6: Final answer
    x = 1,380.55

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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.