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Finding the Fourth Proportional to 2,574.84, 3,861.09 and 819.33

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Solution

The fourth proportional to 2,574.84, 3,861.09 and 819.33 is: 1,228.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,574.84 : 3,861.09 = 819.33 : x
  2. Step 2: Convert to fraction form
    2,574.84/3,861.09 = 819.33/x
  3. Step 3: Cross multiply
    2,574.84x = 3,861.09 × 819.33
  4. Step 4: Simplify right side
    2,574.84x = 3,163,506.87
  5. Step 5: Solve for x
    x = 3,163,506.87/2,574.84
  6. Step 6: Final answer
    x = 1,228.62

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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.