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Finding the Fourth Proportional to 3,920.60, 5,880.90 and 3,604.70

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Solution

The fourth proportional to 3,920.60, 5,880.90 and 3,604.70 is: 5,407.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.60 : 5,880.90 = 3,604.70 : x
  2. Step 2: Convert to fraction form
    3,920.60/5,880.90 = 3,604.70/x
  3. Step 3: Cross multiply
    3,920.60x = 5,880.90 × 3,604.70
  4. Step 4: Simplify right side
    3,920.60x = 21,198,880.23
  5. Step 5: Solve for x
    x = 21,198,880.23/3,920.60
  6. Step 6: Final answer
    x = 5,407.05

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Similar ratio
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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.