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Finding the Fourth Proportional to 1,819.70, 2,730.24 and 1,089.80

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Solution

The fourth proportional to 1,819.70, 2,730.24 and 1,089.80 is: 1,635.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.70 : 2,730.24 = 1,089.80 : x
  2. Step 2: Convert to fraction form
    1,819.70/2,730.24 = 1,089.80/x
  3. Step 3: Cross multiply
    1,819.70x = 2,730.24 × 1,089.80
  4. Step 4: Simplify right side
    1,819.70x = 2,975,415.55
  5. Step 5: Solve for x
    x = 2,975,415.55/1,819.70
  6. Step 6: Final answer
    x = 1,635.11

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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.