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Finding the Fourth Proportional to 774.05, 1,161.16 and 335.22

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Solution

The fourth proportional to 774.05, 1,161.16 and 335.22 is: 502.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.05 : 1,161.16 = 335.22 : x
  2. Step 2: Convert to fraction form
    774.05/1,161.16 = 335.22/x
  3. Step 3: Cross multiply
    774.05x = 1,161.16 × 335.22
  4. Step 4: Simplify right side
    774.05x = 389,243.22
  5. Step 5: Solve for x
    x = 389,243.22/774.05
  6. Step 6: Final answer
    x = 502.86

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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.