Home / 3,280.47-4,919.78-1,089.21

Finding the Fourth Proportional to 3,280.47, 4,919.78 and 1,089.21

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Solution

The fourth proportional to 3,280.47, 4,919.78 and 1,089.21 is: 1,633.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.47 : 4,919.78 = 1,089.21 : x
  2. Step 2: Convert to fraction form
    3,280.47/4,919.78 = 1,089.21/x
  3. Step 3: Cross multiply
    3,280.47x = 4,919.78 × 1,089.21
  4. Step 4: Simplify right side
    3,280.47x = 5,358,668.13
  5. Step 5: Solve for x
    x = 5,358,668.13/3,280.47
  6. Step 6: Final answer
    x = 1,633.51

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1.5x scale

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.