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Finding the Fourth Proportional to 3,906.60, 5,829.90 and 3,491.40

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Solution

The fourth proportional to 3,906.60, 5,829.90 and 3,491.40 is: 5,210.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.60 : 5,829.90 = 3,491.40 : x
  2. Step 2: Convert to fraction form
    3,906.60/5,829.90 = 3,491.40/x
  3. Step 3: Cross multiply
    3,906.60x = 5,829.90 × 3,491.40
  4. Step 4: Simplify right side
    3,906.60x = 20,354,512.86
  5. Step 5: Solve for x
    x = 20,354,512.86/3,906.60
  6. Step 6: Final answer
    x = 5,210.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.