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Finding the Fourth Proportional to 1,398.88, 2,097.96 and 850.96

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Solution

The fourth proportional to 1,398.88, 2,097.96 and 850.96 is: 1,276.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.88 : 2,097.96 = 850.96 : x
  2. Step 2: Convert to fraction form
    1,398.88/2,097.96 = 850.96/x
  3. Step 3: Cross multiply
    1,398.88x = 2,097.96 × 850.96
  4. Step 4: Simplify right side
    1,398.88x = 1,785,280.04
  5. Step 5: Solve for x
    x = 1,785,280.04/1,398.88
  6. Step 6: Final answer
    x = 1,276.22

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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.