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Finding the Fourth Proportional to 774.70, 1,161.91 and 254.71

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Solution

The fourth proportional to 774.70, 1,161.91 and 254.71 is: 382.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.70 : 1,161.91 = 254.71 : x
  2. Step 2: Convert to fraction form
    774.70/1,161.91 = 254.71/x
  3. Step 3: Cross multiply
    774.70x = 1,161.91 × 254.71
  4. Step 4: Simplify right side
    774.70x = 295,944.29
  5. Step 5: Solve for x
    x = 295,944.29/774.70
  6. Step 6: Final answer
    x = 382.01

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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.