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Finding the Fourth Proportional to 3,900.62, 5,385.48 and 3,064.70

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Solution

The fourth proportional to 3,900.62, 5,385.48 and 3,064.70 is: 4,231.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.62 : 5,385.48 = 3,064.70 : x
  2. Step 2: Convert to fraction form
    3,900.62/5,385.48 = 3,064.70/x
  3. Step 3: Cross multiply
    3,900.62x = 5,385.48 × 3,064.70
  4. Step 4: Simplify right side
    3,900.62x = 16,504,880.56
  5. Step 5: Solve for x
    x = 16,504,880.56/3,900.62
  6. Step 6: Final answer
    x = 4,231.35

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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.