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Finding the Fourth Proportional to 3,953.21, 5,919.26 and 3,486.11

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Solution

The fourth proportional to 3,953.21, 5,919.26 and 3,486.11 is: 5,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.21 : 5,919.26 = 3,486.11 : x
  2. Step 2: Convert to fraction form
    3,953.21/5,919.26 = 3,486.11/x
  3. Step 3: Cross multiply
    3,953.21x = 5,919.26 × 3,486.11
  4. Step 4: Simplify right side
    3,953.21x = 20,635,144.45
  5. Step 5: Solve for x
    x = 20,635,144.45/3,953.21
  6. Step 6: Final answer
    x = 5,219.85

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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.