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Finding the Fourth Proportional to 774.85, 1,162.61 and 363.70

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Solution

The fourth proportional to 774.85, 1,162.61 and 363.70 is: 545.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.85 : 1,162.61 = 363.70 : x
  2. Step 2: Convert to fraction form
    774.85/1,162.61 = 363.70/x
  3. Step 3: Cross multiply
    774.85x = 1,162.61 × 363.70
  4. Step 4: Simplify right side
    774.85x = 422,845.30
  5. Step 5: Solve for x
    x = 422,845.30/774.85
  6. Step 6: Final answer
    x = 545.71

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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.