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Finding the Fourth Proportional to 2,650.78, 3,659.79 and 1,811.18

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Solution

The fourth proportional to 2,650.78, 3,659.79 and 1,811.18 is: 2,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,650.78 : 3,659.79 = 1,811.18 : x
  2. Step 2: Convert to fraction form
    2,650.78/3,659.79 = 1,811.18/x
  3. Step 3: Cross multiply
    2,650.78x = 3,659.79 × 1,811.18
  4. Step 4: Simplify right side
    2,650.78x = 6,628,538.45
  5. Step 5: Solve for x
    x = 6,628,538.45/2,650.78
  6. Step 6: Final answer
    x = 2,500.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.