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Finding the Fourth Proportional to 2,116.53, 3,171.86 and 798.93

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Solution

The fourth proportional to 2,116.53, 3,171.86 and 798.93 is: 1,197.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.53 : 3,171.86 = 798.93 : x
  2. Step 2: Convert to fraction form
    2,116.53/3,171.86 = 798.93/x
  3. Step 3: Cross multiply
    2,116.53x = 3,171.86 × 798.93
  4. Step 4: Simplify right side
    2,116.53x = 2,534,093.11
  5. Step 5: Solve for x
    x = 2,534,093.11/2,116.53
  6. Step 6: Final answer
    x = 1,197.29

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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.