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Finding the Fourth Proportional to 764.98, 1,146.57 and 353.24

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Solution

The fourth proportional to 764.98, 1,146.57 and 353.24 is: 529.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.98 : 1,146.57 = 353.24 : x
  2. Step 2: Convert to fraction form
    764.98/1,146.57 = 353.24/x
  3. Step 3: Cross multiply
    764.98x = 1,146.57 × 353.24
  4. Step 4: Simplify right side
    764.98x = 405,014.39
  5. Step 5: Solve for x
    x = 405,014.39/764.98
  6. Step 6: Final answer
    x = 529.44

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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.