Home / 3,990.24-5,998.88-3,215.68

Finding the Fourth Proportional to 3,990.24, 5,998.88 and 3,215.68

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Solution

The fourth proportional to 3,990.24, 5,998.88 and 3,215.68 is: 4,834.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.24 : 5,998.88 = 3,215.68 : x
  2. Step 2: Convert to fraction form
    3,990.24/5,998.88 = 3,215.68/x
  3. Step 3: Cross multiply
    3,990.24x = 5,998.88 × 3,215.68
  4. Step 4: Simplify right side
    3,990.24x = 19,290,462.36
  5. Step 5: Solve for x
    x = 19,290,462.36/3,990.24
  6. Step 6: Final answer
    x = 4,834.41

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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.