Home / 3,990.73-5,507.45-2,311.60

Finding the Fourth Proportional to 3,990.73, 5,507.45 and 2,311.60

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Solution

The fourth proportional to 3,990.73, 5,507.45 and 2,311.60 is: 3,190.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.73 : 5,507.45 = 2,311.60 : x
  2. Step 2: Convert to fraction form
    3,990.73/5,507.45 = 2,311.60/x
  3. Step 3: Cross multiply
    3,990.73x = 5,507.45 × 2,311.60
  4. Step 4: Simplify right side
    3,990.73x = 12,731,009.86
  5. Step 5: Solve for x
    x = 12,731,009.86/3,990.73
  6. Step 6: Final answer
    x = 3,190.15

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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.