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Finding the Fourth Proportional to 3,821.62, 5,732.31 and 1,085.62

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Solution

The fourth proportional to 3,821.62, 5,732.31 and 1,085.62 is: 1,628.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.62 : 5,732.31 = 1,085.62 : x
  2. Step 2: Convert to fraction form
    3,821.62/5,732.31 = 1,085.62/x
  3. Step 3: Cross multiply
    3,821.62x = 5,732.31 × 1,085.62
  4. Step 4: Simplify right side
    3,821.62x = 6,223,110.38
  5. Step 5: Solve for x
    x = 6,223,110.38/3,821.62
  6. Step 6: Final answer
    x = 1,628.40

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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.