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Finding the Fourth Proportional to 774.10, 1,161.50 and 363.36

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Solution

The fourth proportional to 774.10, 1,161.50 and 363.36 is: 545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.10 : 1,161.50 = 363.36 : x
  2. Step 2: Convert to fraction form
    774.10/1,161.50 = 363.36/x
  3. Step 3: Cross multiply
    774.10x = 1,161.50 × 363.36
  4. Step 4: Simplify right side
    774.10x = 422,042.64
  5. Step 5: Solve for x
    x = 422,042.64/774.10
  6. Step 6: Final answer
    x = 545.20

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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.