Home / 3,719.70-5,578.74-1,121.22

Finding the Fourth Proportional to 3,719.70, 5,578.74 and 1,121.22

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Solution

The fourth proportional to 3,719.70, 5,578.74 and 1,121.22 is: 1,681.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,719.70 : 5,578.74 = 1,121.22 : x
  2. Step 2: Convert to fraction form
    3,719.70/5,578.74 = 1,121.22/x
  3. Step 3: Cross multiply
    3,719.70x = 5,578.74 × 1,121.22
  4. Step 4: Simplify right side
    3,719.70x = 6,254,994.86
  5. Step 5: Solve for x
    x = 6,254,994.86/3,719.70
  6. Step 6: Final answer
    x = 1,681.59

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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.