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Finding the Fourth Proportional to 3,812.95, 5,721.84 and 1,621.67

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Solution

The fourth proportional to 3,812.95, 5,721.84 and 1,621.67 is: 2,433.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812.95 : 5,721.84 = 1,621.67 : x
  2. Step 2: Convert to fraction form
    3,812.95/5,721.84 = 1,621.67/x
  3. Step 3: Cross multiply
    3,812.95x = 5,721.84 × 1,621.67
  4. Step 4: Simplify right side
    3,812.95x = 9,278,950.58
  5. Step 5: Solve for x
    x = 9,278,950.58/3,812.95
  6. Step 6: Final answer
    x = 2,433.54

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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.