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Finding the Fourth Proportional to 774.82, 1,161.96 and 341.86

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Solution

The fourth proportional to 774.82, 1,161.96 and 341.86 is: 512.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.82 : 1,161.96 = 341.86 : x
  2. Step 2: Convert to fraction form
    774.82/1,161.96 = 341.86/x
  3. Step 3: Cross multiply
    774.82x = 1,161.96 × 341.86
  4. Step 4: Simplify right side
    774.82x = 397,227.65
  5. Step 5: Solve for x
    x = 397,227.65/774.82
  6. Step 6: Final answer
    x = 512.67

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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.