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Finding the Fourth Proportional to 619.40, 929.52 and 331.04

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Solution

The fourth proportional to 619.40, 929.52 and 331.04 is: 496.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.40 : 929.52 = 331.04 : x
  2. Step 2: Convert to fraction form
    619.40/929.52 = 331.04/x
  3. Step 3: Cross multiply
    619.40x = 929.52 × 331.04
  4. Step 4: Simplify right side
    619.40x = 307,708.30
  5. Step 5: Solve for x
    x = 307,708.30/619.40
  6. Step 6: Final answer
    x = 496.78

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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.