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Finding the Fourth Proportional to 1,097.11, 1,513.78 and 798.83

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Solution

The fourth proportional to 1,097.11, 1,513.78 and 798.83 is: 1,102.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.11 : 1,513.78 = 798.83 : x
  2. Step 2: Convert to fraction form
    1,097.11/1,513.78 = 798.83/x
  3. Step 3: Cross multiply
    1,097.11x = 1,513.78 × 798.83
  4. Step 4: Simplify right side
    1,097.11x = 1,209,252.88
  5. Step 5: Solve for x
    x = 1,209,252.88/1,097.11
  6. Step 6: Final answer
    x = 1,102.22

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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.