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Finding the Fourth Proportional to 226.71, 312.89 and 153.18

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Solution

The fourth proportional to 226.71, 312.89 and 153.18 is: 211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.71 : 312.89 = 153.18 : x
  2. Step 2: Convert to fraction form
    226.71/312.89 = 153.18/x
  3. Step 3: Cross multiply
    226.71x = 312.89 × 153.18
  4. Step 4: Simplify right side
    226.71x = 47,927.72
  5. Step 5: Solve for x
    x = 47,927.72/226.71
  6. Step 6: Final answer
    x = 211.40

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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.