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Finding the Fourth Proportional to 319.13, 440.54 and 201.21

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Solution

The fourth proportional to 319.13, 440.54 and 201.21 is: 277.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.13 : 440.54 = 201.21 : x
  2. Step 2: Convert to fraction form
    319.13/440.54 = 201.21/x
  3. Step 3: Cross multiply
    319.13x = 440.54 × 201.21
  4. Step 4: Simplify right side
    319.13x = 88,641.05
  5. Step 5: Solve for x
    x = 88,641.05/319.13
  6. Step 6: Final answer
    x = 277.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.