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Finding the Fourth Proportional to 755.92, 1,134.20 and 409.49

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Solution

The fourth proportional to 755.92, 1,134.20 and 409.49 is: 614.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.92 : 1,134.20 = 409.49 : x
  2. Step 2: Convert to fraction form
    755.92/1,134.20 = 409.49/x
  3. Step 3: Cross multiply
    755.92x = 1,134.20 × 409.49
  4. Step 4: Simplify right side
    755.92x = 464,443.56
  5. Step 5: Solve for x
    x = 464,443.56/755.92
  6. Step 6: Final answer
    x = 614.41

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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.