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Finding the Fourth Proportional to 2,799.87, 4,198.94 and 925.40

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Solution

The fourth proportional to 2,799.87, 4,198.94 and 925.40 is: 1,387.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,799.87 : 4,198.94 = 925.40 : x
  2. Step 2: Convert to fraction form
    2,799.87/4,198.94 = 925.40/x
  3. Step 3: Cross multiply
    2,799.87x = 4,198.94 × 925.40
  4. Step 4: Simplify right side
    2,799.87x = 3,885,696.61
  5. Step 5: Solve for x
    x = 3,885,696.61/2,799.87
  6. Step 6: Final answer
    x = 1,387.82

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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.