Home / 3,280.79-4,919.56-1,431.10

Finding the Fourth Proportional to 3,280.79, 4,919.56 and 1,431.10

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Solution

The fourth proportional to 3,280.79, 4,919.56 and 1,431.10 is: 2,145.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.79 : 4,919.56 = 1,431.10 : x
  2. Step 2: Convert to fraction form
    3,280.79/4,919.56 = 1,431.10/x
  3. Step 3: Cross multiply
    3,280.79x = 4,919.56 × 1,431.10
  4. Step 4: Simplify right side
    3,280.79x = 7,040,366.44
  5. Step 5: Solve for x
    x = 7,040,366.44/3,280.79
  6. Step 6: Final answer
    x = 2,145.94

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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.