Home / 3,188.25-4,398.30-1,861.20

Finding the Fourth Proportional to 3,188.25, 4,398.30 and 1,861.20

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Solution

The fourth proportional to 3,188.25, 4,398.30 and 1,861.20 is: 2,567.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.25 : 4,398.30 = 1,861.20 : x
  2. Step 2: Convert to fraction form
    3,188.25/4,398.30 = 1,861.20/x
  3. Step 3: Cross multiply
    3,188.25x = 4,398.30 × 1,861.20
  4. Step 4: Simplify right side
    3,188.25x = 8,186,115.96
  5. Step 5: Solve for x
    x = 8,186,115.96/3,188.25
  6. Step 6: Final answer
    x = 2,567.59

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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.