Home / 3,719.76-5,118.12-3,220.80

Finding the Fourth Proportional to 3,719.76, 5,118.12 and 3,220.80

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Solution

The fourth proportional to 3,719.76, 5,118.12 and 3,220.80 is: 4,431.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,719.76 : 5,118.12 = 3,220.80 : x
  2. Step 2: Convert to fraction form
    3,719.76/5,118.12 = 3,220.80/x
  3. Step 3: Cross multiply
    3,719.76x = 5,118.12 × 3,220.80
  4. Step 4: Simplify right side
    3,719.76x = 16,484,440.90
  5. Step 5: Solve for x
    x = 16,484,440.90/3,719.76
  6. Step 6: Final answer
    x = 4,431.59

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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.