Home / 4,979.20-7,469.70-2,507.80

Finding the Fourth Proportional to 4,979.20, 7,469.70 and 2,507.80

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Solution

The fourth proportional to 4,979.20, 7,469.70 and 2,507.80 is: 3,762.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.20 : 7,469.70 = 2,507.80 : x
  2. Step 2: Convert to fraction form
    4,979.20/7,469.70 = 2,507.80/x
  3. Step 3: Cross multiply
    4,979.20x = 7,469.70 × 2,507.80
  4. Step 4: Simplify right side
    4,979.20x = 18,732,513.66
  5. Step 5: Solve for x
    x = 18,732,513.66/4,979.20
  6. Step 6: Final answer
    x = 3,762.15

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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.