Home / 3,990.84-5,987.23-1,217.56

Finding the Fourth Proportional to 3,990.84, 5,987.23 and 1,217.56

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Solution

The fourth proportional to 3,990.84, 5,987.23 and 1,217.56 is: 1,826.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.84 : 5,987.23 = 1,217.56 : x
  2. Step 2: Convert to fraction form
    3,990.84/5,987.23 = 1,217.56/x
  3. Step 3: Cross multiply
    3,990.84x = 5,987.23 × 1,217.56
  4. Step 4: Simplify right side
    3,990.84x = 7,289,793.75
  5. Step 5: Solve for x
    x = 7,289,793.75/3,990.84
  6. Step 6: Final answer
    x = 1,826.63

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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.