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Finding the Fourth Proportional to 3,591.05, 5,412.35 and 3,390.12

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Solution

The fourth proportional to 3,591.05, 5,412.35 and 3,390.12 is: 5,109.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,591.05 : 5,412.35 = 3,390.12 : x
  2. Step 2: Convert to fraction form
    3,591.05/5,412.35 = 3,390.12/x
  3. Step 3: Cross multiply
    3,591.05x = 5,412.35 × 3,390.12
  4. Step 4: Simplify right side
    3,591.05x = 18,348,499.03
  5. Step 5: Solve for x
    x = 18,348,499.03/3,591.05
  6. Step 6: Final answer
    x = 5,109.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.