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Finding the Fourth Proportional to 4,880.80, 7,309.05 and 3,908.80

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Solution

The fourth proportional to 4,880.80, 7,309.05 and 3,908.80 is: 5,853.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,880.80 : 7,309.05 = 3,908.80 : x
  2. Step 2: Convert to fraction form
    4,880.80/7,309.05 = 3,908.80/x
  3. Step 3: Cross multiply
    4,880.80x = 7,309.05 × 3,908.80
  4. Step 4: Simplify right side
    4,880.80x = 28,569,614.64
  5. Step 5: Solve for x
    x = 28,569,614.64/4,880.80
  6. Step 6: Final answer
    x = 5,853.47

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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.