Home / 1,621.28-2,431.89-451.27

Finding the Fourth Proportional to 1,621.28, 2,431.89 and 451.27

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Solution

The fourth proportional to 1,621.28, 2,431.89 and 451.27 is: 676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.28 : 2,431.89 = 451.27 : x
  2. Step 2: Convert to fraction form
    1,621.28/2,431.89 = 451.27/x
  3. Step 3: Cross multiply
    1,621.28x = 2,431.89 × 451.27
  4. Step 4: Simplify right side
    1,621.28x = 1,097,436.74
  5. Step 5: Solve for x
    x = 1,097,436.74/1,621.28
  6. Step 6: Final answer
    x = 676.90

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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.