Home / 3,990.26-5,988.13-1,393.20

Finding the Fourth Proportional to 3,990.26, 5,988.13 and 1,393.20

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Solution

The fourth proportional to 3,990.26, 5,988.13 and 1,393.20 is: 2,090.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.26 : 5,988.13 = 1,393.20 : x
  2. Step 2: Convert to fraction form
    3,990.26/5,988.13 = 1,393.20/x
  3. Step 3: Cross multiply
    3,990.26x = 5,988.13 × 1,393.20
  4. Step 4: Simplify right side
    3,990.26x = 8,342,662.72
  5. Step 5: Solve for x
    x = 8,342,662.72/3,990.26
  6. Step 6: Final answer
    x = 2,090.76

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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.