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Finding the Fourth Proportional to 2,647.17, 3,969.47 and 797.94

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Solution

The fourth proportional to 2,647.17, 3,969.47 and 797.94 is: 1,196.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.17 : 3,969.47 = 797.94 : x
  2. Step 2: Convert to fraction form
    2,647.17/3,969.47 = 797.94/x
  3. Step 3: Cross multiply
    2,647.17x = 3,969.47 × 797.94
  4. Step 4: Simplify right side
    2,647.17x = 3,167,394.90
  5. Step 5: Solve for x
    x = 3,167,394.90/2,647.17
  6. Step 6: Final answer
    x = 1,196.52

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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.