Home / 3,990.84-5,986.28-1,394

Finding the Fourth Proportional to 3,990.84, 5,986.28 and 1,394

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Solution

The fourth proportional to 3,990.84, 5,986.28 and 1,394 is: 2,091.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.84 : 5,986.28 = 1,394 : x
  2. Step 2: Convert to fraction form
    3,990.84/5,986.28 = 1,394/x
  3. Step 3: Cross multiply
    3,990.84x = 5,986.28 × 1,394
  4. Step 4: Simplify right side
    3,990.84x = 8,344,874.32
  5. Step 5: Solve for x
    x = 8,344,874.32/3,990.84
  6. Step 6: Final answer
    x = 2,091.01

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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.