Home / 3,318.71-4,578.28-1,990.11

Finding the Fourth Proportional to 3,318.71, 4,578.28 and 1,990.11

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Solution

The fourth proportional to 3,318.71, 4,578.28 and 1,990.11 is: 2,745.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.71 : 4,578.28 = 1,990.11 : x
  2. Step 2: Convert to fraction form
    3,318.71/4,578.28 = 1,990.11/x
  3. Step 3: Cross multiply
    3,318.71x = 4,578.28 × 1,990.11
  4. Step 4: Simplify right side
    3,318.71x = 9,111,280.81
  5. Step 5: Solve for x
    x = 9,111,280.81/3,318.71
  6. Step 6: Final answer
    x = 2,745.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.