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Finding the Fourth Proportional to 3,612.20, 5,420.12 and 1,662.12

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Solution

The fourth proportional to 3,612.20, 5,420.12 and 1,662.12 is: 2,494.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.20 : 5,420.12 = 1,662.12 : x
  2. Step 2: Convert to fraction form
    3,612.20/5,420.12 = 1,662.12/x
  3. Step 3: Cross multiply
    3,612.20x = 5,420.12 × 1,662.12
  4. Step 4: Simplify right side
    3,612.20x = 9,008,881.54
  5. Step 5: Solve for x
    x = 9,008,881.54/3,612.20
  6. Step 6: Final answer
    x = 2,494.02

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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.