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Finding the Fourth Proportional to 764.70, 1,147.05 and 635.10

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Solution

The fourth proportional to 764.70, 1,147.05 and 635.10 is: 952.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.70 : 1,147.05 = 635.10 : x
  2. Step 2: Convert to fraction form
    764.70/1,147.05 = 635.10/x
  3. Step 3: Cross multiply
    764.70x = 1,147.05 × 635.10
  4. Step 4: Simplify right side
    764.70x = 728,491.46
  5. Step 5: Solve for x
    x = 728,491.46/764.70
  6. Step 6: Final answer
    x = 952.65

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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.