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Finding the Fourth Proportional to 774.63, 1,162.19 and 254.64

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Solution

The fourth proportional to 774.63, 1,162.19 and 254.64 is: 382.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.63 : 1,162.19 = 254.64 : x
  2. Step 2: Convert to fraction form
    774.63/1,162.19 = 254.64/x
  3. Step 3: Cross multiply
    774.63x = 1,162.19 × 254.64
  4. Step 4: Simplify right side
    774.63x = 295,932.98
  5. Step 5: Solve for x
    x = 295,932.98/774.63
  6. Step 6: Final answer
    x = 382.03

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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.