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Finding the Fourth Proportional to 2,057.64, 3,087.66 and 825.60

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Solution

The fourth proportional to 2,057.64, 3,087.66 and 825.60 is: 1,238.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,057.64 : 3,087.66 = 825.60 : x
  2. Step 2: Convert to fraction form
    2,057.64/3,087.66 = 825.60/x
  3. Step 3: Cross multiply
    2,057.64x = 3,087.66 × 825.60
  4. Step 4: Simplify right side
    2,057.64x = 2,549,172.10
  5. Step 5: Solve for x
    x = 2,549,172.10/2,057.64
  6. Step 6: Final answer
    x = 1,238.88

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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.