Home / 1,621.28-2,431.92-1,076.96

Finding the Fourth Proportional to 1,621.28, 2,431.92 and 1,076.96

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Solution

The fourth proportional to 1,621.28, 2,431.92 and 1,076.96 is: 1,615.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.28 : 2,431.92 = 1,076.96 : x
  2. Step 2: Convert to fraction form
    1,621.28/2,431.92 = 1,076.96/x
  3. Step 3: Cross multiply
    1,621.28x = 2,431.92 × 1,076.96
  4. Step 4: Simplify right side
    1,621.28x = 2,619,080.56
  5. Step 5: Solve for x
    x = 2,619,080.56/1,621.28
  6. Step 6: Final answer
    x = 1,615.44

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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.