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Finding the Fourth Proportional to 491.26, 736.33 and 217.31

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Solution

The fourth proportional to 491.26, 736.33 and 217.31 is: 325.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.26 : 736.33 = 217.31 : x
  2. Step 2: Convert to fraction form
    491.26/736.33 = 217.31/x
  3. Step 3: Cross multiply
    491.26x = 736.33 × 217.31
  4. Step 4: Simplify right side
    491.26x = 160,010.79
  5. Step 5: Solve for x
    x = 160,010.79/491.26
  6. Step 6: Final answer
    x = 325.72

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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.