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Finding the Fourth Proportional to 218.31, 325.88 and 201.30

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Solution

The fourth proportional to 218.31, 325.88 and 201.30 is: 300.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.31 : 325.88 = 201.30 : x
  2. Step 2: Convert to fraction form
    218.31/325.88 = 201.30/x
  3. Step 3: Cross multiply
    218.31x = 325.88 × 201.30
  4. Step 4: Simplify right side
    218.31x = 65,598.64
  5. Step 5: Solve for x
    x = 65,598.64/218.31
  6. Step 6: Final answer
    x = 300.48

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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.