Home / 4,990.20-7,485.30-3,319.80

Finding the Fourth Proportional to 4,990.20, 7,485.30 and 3,319.80

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Solution

The fourth proportional to 4,990.20, 7,485.30 and 3,319.80 is: 4,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.20 : 7,485.30 = 3,319.80 : x
  2. Step 2: Convert to fraction form
    4,990.20/7,485.30 = 3,319.80/x
  3. Step 3: Cross multiply
    4,990.20x = 7,485.30 × 3,319.80
  4. Step 4: Simplify right side
    4,990.20x = 24,849,698.94
  5. Step 5: Solve for x
    x = 24,849,698.94/4,990.20
  6. Step 6: Final answer
    x = 4,979.70

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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.