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Finding the Fourth Proportional to 774.78, 1,161.59 and 363.62

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Solution

The fourth proportional to 774.78, 1,161.59 and 363.62 is: 545.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.78 : 1,161.59 = 363.62 : x
  2. Step 2: Convert to fraction form
    774.78/1,161.59 = 363.62/x
  3. Step 3: Cross multiply
    774.78x = 1,161.59 × 363.62
  4. Step 4: Simplify right side
    774.78x = 422,369.73
  5. Step 5: Solve for x
    x = 422,369.73/774.78
  6. Step 6: Final answer
    x = 545.15

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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.