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Finding the Fourth Proportional to 227.78, 313.99 and 153.98

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Solution

The fourth proportional to 227.78, 313.99 and 153.98 is: 212.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.78 : 313.99 = 153.98 : x
  2. Step 2: Convert to fraction form
    227.78/313.99 = 153.98/x
  3. Step 3: Cross multiply
    227.78x = 313.99 × 153.98
  4. Step 4: Simplify right side
    227.78x = 48,348.18
  5. Step 5: Solve for x
    x = 48,348.18/227.78
  6. Step 6: Final answer
    x = 212.26

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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.