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Finding the Fourth Proportional to 2,069.78, 3,102.44 and 836.55

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Solution

The fourth proportional to 2,069.78, 3,102.44 and 836.55 is: 1,253.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,069.78 : 3,102.44 = 836.55 : x
  2. Step 2: Convert to fraction form
    2,069.78/3,102.44 = 836.55/x
  3. Step 3: Cross multiply
    2,069.78x = 3,102.44 × 836.55
  4. Step 4: Simplify right side
    2,069.78x = 2,595,342.00
  5. Step 5: Solve for x
    x = 2,595,342.00/2,069.78
  6. Step 6: Final answer
    x = 1,253.92

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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.