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Finding the Fourth Proportional to 266.25, 399.35 and 144.75

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Solution

The fourth proportional to 266.25, 399.35 and 144.75 is: 217.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.25 : 399.35 = 144.75 : x
  2. Step 2: Convert to fraction form
    266.25/399.35 = 144.75/x
  3. Step 3: Cross multiply
    266.25x = 399.35 × 144.75
  4. Step 4: Simplify right side
    266.25x = 57,805.19
  5. Step 5: Solve for x
    x = 57,805.19/266.25
  6. Step 6: Final answer
    x = 217.11

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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.