Home / 3,980.30-5,492.77-2,211.90

Finding the Fourth Proportional to 3,980.30, 5,492.77 and 2,211.90

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Solution

The fourth proportional to 3,980.30, 5,492.77 and 2,211.90 is: 3,052.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.30 : 5,492.77 = 2,211.90 : x
  2. Step 2: Convert to fraction form
    3,980.30/5,492.77 = 2,211.90/x
  3. Step 3: Cross multiply
    3,980.30x = 5,492.77 × 2,211.90
  4. Step 4: Simplify right side
    3,980.30x = 12,149,457.96
  5. Step 5: Solve for x
    x = 12,149,457.96/3,980.30
  6. Step 6: Final answer
    x = 3,052.40

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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.