Home / 3,980.37-5,491.28-2,719.40

Finding the Fourth Proportional to 3,980.37, 5,491.28 and 2,719.40

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Solution

The fourth proportional to 3,980.37, 5,491.28 and 2,719.40 is: 3,751.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.37 : 5,491.28 = 2,719.40 : x
  2. Step 2: Convert to fraction form
    3,980.37/5,491.28 = 2,719.40/x
  3. Step 3: Cross multiply
    3,980.37x = 5,491.28 × 2,719.40
  4. Step 4: Simplify right side
    3,980.37x = 14,932,986.83
  5. Step 5: Solve for x
    x = 14,932,986.83/3,980.37
  6. Step 6: Final answer
    x = 3,751.66

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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.