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Finding the Fourth Proportional to 762.28, 1,143.78 and 329.56

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Solution

The fourth proportional to 762.28, 1,143.78 and 329.56 is: 494.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.28 : 1,143.78 = 329.56 : x
  2. Step 2: Convert to fraction form
    762.28/1,143.78 = 329.56/x
  3. Step 3: Cross multiply
    762.28x = 1,143.78 × 329.56
  4. Step 4: Simplify right side
    762.28x = 376,944.14
  5. Step 5: Solve for x
    x = 376,944.14/762.28
  6. Step 6: Final answer
    x = 494.50

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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.