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Finding the Fourth Proportional to 216.38, 322.86 and 203.25

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Solution

The fourth proportional to 216.38, 322.86 and 203.25 is: 303.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.38 : 322.86 = 203.25 : x
  2. Step 2: Convert to fraction form
    216.38/322.86 = 203.25/x
  3. Step 3: Cross multiply
    216.38x = 322.86 × 203.25
  4. Step 4: Simplify right side
    216.38x = 65,621.30
  5. Step 5: Solve for x
    x = 65,621.30/216.38
  6. Step 6: Final answer
    x = 303.27

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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.