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Finding the Fourth Proportional to 3,294.51, 4,942.89 and 1,909.05

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Solution

The fourth proportional to 3,294.51, 4,942.89 and 1,909.05 is: 2,864.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,294.51 : 4,942.89 = 1,909.05 : x
  2. Step 2: Convert to fraction form
    3,294.51/4,942.89 = 1,909.05/x
  3. Step 3: Cross multiply
    3,294.51x = 4,942.89 × 1,909.05
  4. Step 4: Simplify right side
    3,294.51x = 9,436,224.15
  5. Step 5: Solve for x
    x = 9,436,224.15/3,294.51
  6. Step 6: Final answer
    x = 2,864.23

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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.