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Finding the Fourth Proportional to 2,650.12, 3,975.72 and 801.16

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Solution

The fourth proportional to 2,650.12, 3,975.72 and 801.16 is: 1,201.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,650.12 : 3,975.72 = 801.16 : x
  2. Step 2: Convert to fraction form
    2,650.12/3,975.72 = 801.16/x
  3. Step 3: Cross multiply
    2,650.12x = 3,975.72 × 801.16
  4. Step 4: Simplify right side
    2,650.12x = 3,185,187.84
  5. Step 5: Solve for x
    x = 3,185,187.84/2,650.12
  6. Step 6: Final answer
    x = 1,201.90

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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.