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Finding the Fourth Proportional to 4,960.80, 7,441.20 and 4,399.20

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Solution

The fourth proportional to 4,960.80, 7,441.20 and 4,399.20 is: 6,598.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,960.80 : 7,441.20 = 4,399.20 : x
  2. Step 2: Convert to fraction form
    4,960.80/7,441.20 = 4,399.20/x
  3. Step 3: Cross multiply
    4,960.80x = 7,441.20 × 4,399.20
  4. Step 4: Simplify right side
    4,960.80x = 32,735,327.04
  5. Step 5: Solve for x
    x = 32,735,327.04/4,960.80
  6. Step 6: Final answer
    x = 6,598.80

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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.