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Finding the Fourth Proportional to 2,577.28, 3,865.92 and 845.50

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Solution

The fourth proportional to 2,577.28, 3,865.92 and 845.50 is: 1,268.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,577.28 : 3,865.92 = 845.50 : x
  2. Step 2: Convert to fraction form
    2,577.28/3,865.92 = 845.50/x
  3. Step 3: Cross multiply
    2,577.28x = 3,865.92 × 845.50
  4. Step 4: Simplify right side
    2,577.28x = 3,268,635.36
  5. Step 5: Solve for x
    x = 3,268,635.36/2,577.28
  6. Step 6: Final answer
    x = 1,268.25

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Double scale
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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.