Home / 3,280.38-4,918.14-1,981.55

Finding the Fourth Proportional to 3,280.38, 4,918.14 and 1,981.55

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Solution

The fourth proportional to 3,280.38, 4,918.14 and 1,981.55 is: 2,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.38 : 4,918.14 = 1,981.55 : x
  2. Step 2: Convert to fraction form
    3,280.38/4,918.14 = 1,981.55/x
  3. Step 3: Cross multiply
    3,280.38x = 4,918.14 × 1,981.55
  4. Step 4: Simplify right side
    3,280.38x = 9,745,515.73
  5. Step 5: Solve for x
    x = 9,745,515.73/3,280.38
  6. Step 6: Final answer
    x = 2,970.85

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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.