Home / 3,940.10-5,910.15-1,167.20

Finding the Fourth Proportional to 3,940.10, 5,910.15 and 1,167.20

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Solution

The fourth proportional to 3,940.10, 5,910.15 and 1,167.20 is: 1,750.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.10 : 5,910.15 = 1,167.20 : x
  2. Step 2: Convert to fraction form
    3,940.10/5,910.15 = 1,167.20/x
  3. Step 3: Cross multiply
    3,940.10x = 5,910.15 × 1,167.20
  4. Step 4: Simplify right side
    3,940.10x = 6,898,327.08
  5. Step 5: Solve for x
    x = 6,898,327.08/3,940.10
  6. Step 6: Final answer
    x = 1,750.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.