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Finding the Fourth Proportional to 1,097.82, 1,644.93 and 879.12

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Solution

The fourth proportional to 1,097.82, 1,644.93 and 879.12 is: 1,317.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.82 : 1,644.93 = 879.12 : x
  2. Step 2: Convert to fraction form
    1,097.82/1,644.93 = 879.12/x
  3. Step 3: Cross multiply
    1,097.82x = 1,644.93 × 879.12
  4. Step 4: Simplify right side
    1,097.82x = 1,446,090.86
  5. Step 5: Solve for x
    x = 1,446,090.86/1,097.82
  6. Step 6: Final answer
    x = 1,317.24

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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.