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Finding the Fourth Proportional to 620.43, 929.63 and 327.91

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Solution

The fourth proportional to 620.43, 929.63 and 327.91 is: 491.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.43 : 929.63 = 327.91 : x
  2. Step 2: Convert to fraction form
    620.43/929.63 = 327.91/x
  3. Step 3: Cross multiply
    620.43x = 929.63 × 327.91
  4. Step 4: Simplify right side
    620.43x = 304,834.97
  5. Step 5: Solve for x
    x = 304,834.97/620.43
  6. Step 6: Final answer
    x = 491.33

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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.