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Finding the Fourth Proportional to 2,908.80, 4,354.63 and 1,919.79

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Solution

The fourth proportional to 2,908.80, 4,354.63 and 1,919.79 is: 2,874.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,908.80 : 4,354.63 = 1,919.79 : x
  2. Step 2: Convert to fraction form
    2,908.80/4,354.63 = 1,919.79/x
  3. Step 3: Cross multiply
    2,908.80x = 4,354.63 × 1,919.79
  4. Step 4: Simplify right side
    2,908.80x = 8,359,970.33
  5. Step 5: Solve for x
    x = 8,359,970.33/2,908.80
  6. Step 6: Final answer
    x = 2,874.03

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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.