Home / 3,990.30-5,505.75-2,396.40

Finding the Fourth Proportional to 3,990.30, 5,505.75 and 2,396.40

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Solution

The fourth proportional to 3,990.30, 5,505.75 and 2,396.40 is: 3,306.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.30 : 5,505.75 = 2,396.40 : x
  2. Step 2: Convert to fraction form
    3,990.30/5,505.75 = 2,396.40/x
  3. Step 3: Cross multiply
    3,990.30x = 5,505.75 × 2,396.40
  4. Step 4: Simplify right side
    3,990.30x = 13,193,979.30
  5. Step 5: Solve for x
    x = 13,193,979.30/3,990.30
  6. Step 6: Final answer
    x = 3,306.51

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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.