Home / 3,990.47-5,985.92-1,217.23

Finding the Fourth Proportional to 3,990.47, 5,985.92 and 1,217.23

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Solution

The fourth proportional to 3,990.47, 5,985.92 and 1,217.23 is: 1,825.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.47 : 5,985.92 = 1,217.23 : x
  2. Step 2: Convert to fraction form
    3,990.47/5,985.92 = 1,217.23/x
  3. Step 3: Cross multiply
    3,990.47x = 5,985.92 × 1,217.23
  4. Step 4: Simplify right side
    3,990.47x = 7,286,241.40
  5. Step 5: Solve for x
    x = 7,286,241.40/3,990.47
  6. Step 6: Final answer
    x = 1,825.91

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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.