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Finding the Fourth Proportional to 5,245.64, 7,873.32 and 2,650.40

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Solution

The fourth proportional to 5,245.64, 7,873.32 and 2,650.40 is: 3,978.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.64 : 7,873.32 = 2,650.40 : x
  2. Step 2: Convert to fraction form
    5,245.64/7,873.32 = 2,650.40/x
  3. Step 3: Cross multiply
    5,245.64x = 7,873.32 × 2,650.40
  4. Step 4: Simplify right side
    5,245.64x = 20,867,476.95
  5. Step 5: Solve for x
    x = 20,867,476.95/5,245.64
  6. Step 6: Final answer
    x = 3,978.06

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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.