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Finding the Fourth Proportional to 217.69, 324.35 and 203.72

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Solution

The fourth proportional to 217.69, 324.35 and 203.72 is: 303.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.69 : 324.35 = 203.72 : x
  2. Step 2: Convert to fraction form
    217.69/324.35 = 203.72/x
  3. Step 3: Cross multiply
    217.69x = 324.35 × 203.72
  4. Step 4: Simplify right side
    217.69x = 66,075.85
  5. Step 5: Solve for x
    x = 66,075.85/217.69
  6. Step 6: Final answer
    x = 303.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.