Home / 3,318.72-4,578.56-1,921.28

Finding the Fourth Proportional to 3,318.72, 4,578.56 and 1,921.28

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Solution

The fourth proportional to 3,318.72, 4,578.56 and 1,921.28 is: 2,650.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.72 : 4,578.56 = 1,921.28 : x
  2. Step 2: Convert to fraction form
    3,318.72/4,578.56 = 1,921.28/x
  3. Step 3: Cross multiply
    3,318.72x = 4,578.56 × 1,921.28
  4. Step 4: Simplify right side
    3,318.72x = 8,796,695.76
  5. Step 5: Solve for x
    x = 8,796,695.76/3,318.72
  6. Step 6: Final answer
    x = 2,650.63

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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.