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Finding the Fourth Proportional to 774.57, 1,161.87 and 254.94

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Solution

The fourth proportional to 774.57, 1,161.87 and 254.94 is: 382.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.57 : 1,161.87 = 254.94 : x
  2. Step 2: Convert to fraction form
    774.57/1,161.87 = 254.94/x
  3. Step 3: Cross multiply
    774.57x = 1,161.87 × 254.94
  4. Step 4: Simplify right side
    774.57x = 296,207.14
  5. Step 5: Solve for x
    x = 296,207.14/774.57
  6. Step 6: Final answer
    x = 382.41

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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.