Home / 3,619.76-4,991.92-2,291.20

Finding the Fourth Proportional to 3,619.76, 4,991.92 and 2,291.20

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Solution

The fourth proportional to 3,619.76, 4,991.92 and 2,291.20 is: 3,159.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.76 : 4,991.92 = 2,291.20 : x
  2. Step 2: Convert to fraction form
    3,619.76/4,991.92 = 2,291.20/x
  3. Step 3: Cross multiply
    3,619.76x = 4,991.92 × 2,291.20
  4. Step 4: Simplify right side
    3,619.76x = 11,437,487.10
  5. Step 5: Solve for x
    x = 11,437,487.10/3,619.76
  6. Step 6: Final answer
    x = 3,159.74

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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.