Home / 3,990.45-5,977.58-1,850.31

Finding the Fourth Proportional to 3,990.45, 5,977.58 and 1,850.31

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Solution

The fourth proportional to 3,990.45, 5,977.58 and 1,850.31 is: 2,771.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.45 : 5,977.58 = 1,850.31 : x
  2. Step 2: Convert to fraction form
    3,990.45/5,977.58 = 1,850.31/x
  3. Step 3: Cross multiply
    3,990.45x = 5,977.58 × 1,850.31
  4. Step 4: Simplify right side
    3,990.45x = 11,060,346.16
  5. Step 5: Solve for x
    x = 11,060,346.16/3,990.45
  6. Step 6: Final answer
    x = 2,771.70

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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.