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Finding the Fourth Proportional to 2,621.04, 3,928.92 and 976.56

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Solution

The fourth proportional to 2,621.04, 3,928.92 and 976.56 is: 1,463.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.04 : 3,928.92 = 976.56 : x
  2. Step 2: Convert to fraction form
    2,621.04/3,928.92 = 976.56/x
  3. Step 3: Cross multiply
    2,621.04x = 3,928.92 × 976.56
  4. Step 4: Simplify right side
    2,621.04x = 3,836,826.12
  5. Step 5: Solve for x
    x = 3,836,826.12/2,621.04
  6. Step 6: Final answer
    x = 1,463.86

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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.