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Finding the Fourth Proportional to 764.19, 1,146.29 and 251.19

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Solution

The fourth proportional to 764.19, 1,146.29 and 251.19 is: 376.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.19 : 1,146.29 = 251.19 : x
  2. Step 2: Convert to fraction form
    764.19/1,146.29 = 251.19/x
  3. Step 3: Cross multiply
    764.19x = 1,146.29 × 251.19
  4. Step 4: Simplify right side
    764.19x = 287,936.59
  5. Step 5: Solve for x
    x = 287,936.59/764.19
  6. Step 6: Final answer
    x = 376.79

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Double scale
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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.