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Finding the Fourth Proportional to 774.31, 1,161.34 and 226.36

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Solution

The fourth proportional to 774.31, 1,161.34 and 226.36 is: 339.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.31 : 1,161.34 = 226.36 : x
  2. Step 2: Convert to fraction form
    774.31/1,161.34 = 226.36/x
  3. Step 3: Cross multiply
    774.31x = 1,161.34 × 226.36
  4. Step 4: Simplify right side
    774.31x = 262,880.92
  5. Step 5: Solve for x
    x = 262,880.92/774.31
  6. Step 6: Final answer
    x = 339.50

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Double scale
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Similar ratio
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1.5x scale

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.