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Finding the Fourth Proportional to 1,097.58, 1,644.21 and 839.82

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Solution

The fourth proportional to 1,097.58, 1,644.21 and 839.82 is: 1,258.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.58 : 1,644.21 = 839.82 : x
  2. Step 2: Convert to fraction form
    1,097.58/1,644.21 = 839.82/x
  3. Step 3: Cross multiply
    1,097.58x = 1,644.21 × 839.82
  4. Step 4: Simplify right side
    1,097.58x = 1,380,840.44
  5. Step 5: Solve for x
    x = 1,380,840.44/1,097.58
  6. Step 6: Final answer
    x = 1,258.08

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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.