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Finding the Fourth Proportional to 491.97, 738.40 and 439.83

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Solution

The fourth proportional to 491.97, 738.40 and 439.83 is: 660.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.97 : 738.40 = 439.83 : x
  2. Step 2: Convert to fraction form
    491.97/738.40 = 439.83/x
  3. Step 3: Cross multiply
    491.97x = 738.40 × 439.83
  4. Step 4: Simplify right side
    491.97x = 324,770.20
  5. Step 5: Solve for x
    x = 324,770.20/491.97
  6. Step 6: Final answer
    x = 660.14

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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.