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Finding the Fourth Proportional to 2,161.08, 3,241.26 and 774.20

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Solution

The fourth proportional to 2,161.08, 3,241.26 and 774.20 is: 1,161.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.08 : 3,241.26 = 774.20 : x
  2. Step 2: Convert to fraction form
    2,161.08/3,241.26 = 774.20/x
  3. Step 3: Cross multiply
    2,161.08x = 3,241.26 × 774.20
  4. Step 4: Simplify right side
    2,161.08x = 2,509,379.62
  5. Step 5: Solve for x
    x = 2,509,379.62/2,161.08
  6. Step 6: Final answer
    x = 1,161.17

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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.