Home / 3,318.28-4,578.96-1,921.12

Finding the Fourth Proportional to 3,318.28, 4,578.96 and 1,921.12

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Solution

The fourth proportional to 3,318.28, 4,578.96 and 1,921.12 is: 2,650.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.28 : 4,578.96 = 1,921.12 : x
  2. Step 2: Convert to fraction form
    3,318.28/4,578.96 = 1,921.12/x
  3. Step 3: Cross multiply
    3,318.28x = 4,578.96 × 1,921.12
  4. Step 4: Simplify right side
    3,318.28x = 8,796,731.64
  5. Step 5: Solve for x
    x = 8,796,731.64/3,318.28
  6. Step 6: Final answer
    x = 2,650.99

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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.