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Finding the Fourth Proportional to 491.91, 738.33 and 480.68

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Solution

The fourth proportional to 491.91, 738.33 and 480.68 is: 721.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.91 : 738.33 = 480.68 : x
  2. Step 2: Convert to fraction form
    491.91/738.33 = 480.68/x
  3. Step 3: Cross multiply
    491.91x = 738.33 × 480.68
  4. Step 4: Simplify right side
    491.91x = 354,900.46
  5. Step 5: Solve for x
    x = 354,900.46/491.91
  6. Step 6: Final answer
    x = 721.47

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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.