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Finding the Fourth Proportional to 3,097.90, 4,646.43 and 789.40

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Solution

The fourth proportional to 3,097.90, 4,646.43 and 789.40 is: 1,183.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,097.90 : 4,646.43 = 789.40 : x
  2. Step 2: Convert to fraction form
    3,097.90/4,646.43 = 789.40/x
  3. Step 3: Cross multiply
    3,097.90x = 4,646.43 × 789.40
  4. Step 4: Simplify right side
    3,097.90x = 3,667,891.84
  5. Step 5: Solve for x
    x = 3,667,891.84/3,097.90
  6. Step 6: Final answer
    x = 1,183.99

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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.