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Finding the Fourth Proportional to 3,551.62, 5,320.14 and 1,991.56

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Solution

The fourth proportional to 3,551.62, 5,320.14 and 1,991.56 is: 2,983.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,551.62 : 5,320.14 = 1,991.56 : x
  2. Step 2: Convert to fraction form
    3,551.62/5,320.14 = 1,991.56/x
  3. Step 3: Cross multiply
    3,551.62x = 5,320.14 × 1,991.56
  4. Step 4: Simplify right side
    3,551.62x = 10,595,378.02
  5. Step 5: Solve for x
    x = 10,595,378.02/3,551.62
  6. Step 6: Final answer
    x = 2,983.25

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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.