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Finding the Fourth Proportional to 3,493.20, 4,820.22 and 1,921.20

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Solution

The fourth proportional to 3,493.20, 4,820.22 and 1,921.20 is: 2,651.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,493.20 : 4,820.22 = 1,921.20 : x
  2. Step 2: Convert to fraction form
    3,493.20/4,820.22 = 1,921.20/x
  3. Step 3: Cross multiply
    3,493.20x = 4,820.22 × 1,921.20
  4. Step 4: Simplify right side
    3,493.20x = 9,260,606.66
  5. Step 5: Solve for x
    x = 9,260,606.66/3,493.20
  6. Step 6: Final answer
    x = 2,651.04

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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.