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Finding the Fourth Proportional to 266.87, 398.49 and 228.29

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Solution

The fourth proportional to 266.87, 398.49 and 228.29 is: 340.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.87 : 398.49 = 228.29 : x
  2. Step 2: Convert to fraction form
    266.87/398.49 = 228.29/x
  3. Step 3: Cross multiply
    266.87x = 398.49 × 228.29
  4. Step 4: Simplify right side
    266.87x = 90,973.72
  5. Step 5: Solve for x
    x = 90,973.72/266.87
  6. Step 6: Final answer
    x = 340.89

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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.