Home / 3,718.08-5,578.80-1,121.28

Finding the Fourth Proportional to 3,718.08, 5,578.80 and 1,121.28

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Solution

The fourth proportional to 3,718.08, 5,578.80 and 1,121.28 is: 1,682.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,718.08 : 5,578.80 = 1,121.28 : x
  2. Step 2: Convert to fraction form
    3,718.08/5,578.80 = 1,121.28/x
  3. Step 3: Cross multiply
    3,718.08x = 5,578.80 × 1,121.28
  4. Step 4: Simplify right side
    3,718.08x = 6,255,396.86
  5. Step 5: Solve for x
    x = 6,255,396.86/3,718.08
  6. Step 6: Final answer
    x = 1,682.43

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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.