Home / 3,990.80-5,497.08-3,360.56

Finding the Fourth Proportional to 3,990.80, 5,497.08 and 3,360.56

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Solution

The fourth proportional to 3,990.80, 5,497.08 and 3,360.56 is: 4,628.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.80 : 5,497.08 = 3,360.56 : x
  2. Step 2: Convert to fraction form
    3,990.80/5,497.08 = 3,360.56/x
  3. Step 3: Cross multiply
    3,990.80x = 5,497.08 × 3,360.56
  4. Step 4: Simplify right side
    3,990.80x = 18,473,267.16
  5. Step 5: Solve for x
    x = 18,473,267.16/3,990.80
  6. Step 6: Final answer
    x = 4,628.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.