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Finding the Fourth Proportional to 266.97, 398.69 and 228.05

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Solution

The fourth proportional to 266.97, 398.69 and 228.05 is: 340.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.97 : 398.69 = 228.05 : x
  2. Step 2: Convert to fraction form
    266.97/398.69 = 228.05/x
  3. Step 3: Cross multiply
    266.97x = 398.69 × 228.05
  4. Step 4: Simplify right side
    266.97x = 90,921.25
  5. Step 5: Solve for x
    x = 90,921.25/266.97
  6. Step 6: Final answer
    x = 340.57

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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.