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Finding the Fourth Proportional to 838.97, 1,248.93 and 799.18

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Solution

The fourth proportional to 838.97, 1,248.93 and 799.18 is: 1,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.97 : 1,248.93 = 799.18 : x
  2. Step 2: Convert to fraction form
    838.97/1,248.93 = 799.18/x
  3. Step 3: Cross multiply
    838.97x = 1,248.93 × 799.18
  4. Step 4: Simplify right side
    838.97x = 998,119.88
  5. Step 5: Solve for x
    x = 998,119.88/838.97
  6. Step 6: Final answer
    x = 1,189.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.