Home / 3,980.22-5,489.58-2,784.82

Finding the Fourth Proportional to 3,980.22, 5,489.58 and 2,784.82

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Solution

The fourth proportional to 3,980.22, 5,489.58 and 2,784.82 is: 3,840.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.22 : 5,489.58 = 2,784.82 : x
  2. Step 2: Convert to fraction form
    3,980.22/5,489.58 = 2,784.82/x
  3. Step 3: Cross multiply
    3,980.22x = 5,489.58 × 2,784.82
  4. Step 4: Simplify right side
    3,980.22x = 15,287,492.18
  5. Step 5: Solve for x
    x = 15,287,492.18/3,980.22
  6. Step 6: Final answer
    x = 3,840.87

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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.