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Finding the Fourth Proportional to 2,379.55, 3,569.75 and 819.73

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Solution

The fourth proportional to 2,379.55, 3,569.75 and 819.73 is: 1,229.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.55 : 3,569.75 = 819.73 : x
  2. Step 2: Convert to fraction form
    2,379.55/3,569.75 = 819.73/x
  3. Step 3: Cross multiply
    2,379.55x = 3,569.75 × 819.73
  4. Step 4: Simplify right side
    2,379.55x = 2,926,231.17
  5. Step 5: Solve for x
    x = 2,926,231.17/2,379.55
  6. Step 6: Final answer
    x = 1,229.74

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1.5x scale

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.