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Finding the Fourth Proportional to 1,909.40, 2,865.30 and 1,819.52

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Solution

The fourth proportional to 1,909.40, 2,865.30 and 1,819.52 is: 2,730.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.40 : 2,865.30 = 1,819.52 : x
  2. Step 2: Convert to fraction form
    1,909.40/2,865.30 = 1,819.52/x
  3. Step 3: Cross multiply
    1,909.40x = 2,865.30 × 1,819.52
  4. Step 4: Simplify right side
    1,909.40x = 5,213,470.66
  5. Step 5: Solve for x
    x = 5,213,470.66/1,909.40
  6. Step 6: Final answer
    x = 2,730.42

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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.