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Finding the Fourth Proportional to 3,280.41, 4,919.40 and 1,199.70

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Solution

The fourth proportional to 3,280.41, 4,919.40 and 1,199.70 is: 1,799.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.41 : 4,919.40 = 1,199.70 : x
  2. Step 2: Convert to fraction form
    3,280.41/4,919.40 = 1,199.70/x
  3. Step 3: Cross multiply
    3,280.41x = 4,919.40 × 1,199.70
  4. Step 4: Simplify right side
    3,280.41x = 5,901,804.18
  5. Step 5: Solve for x
    x = 5,901,804.18/3,280.41
  6. Step 6: Final answer
    x = 1,799.11

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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.