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Finding the Fourth Proportional to 226.36, 312.29 and 138.98

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Solution

The fourth proportional to 226.36, 312.29 and 138.98 is: 191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.36 : 312.29 = 138.98 : x
  2. Step 2: Convert to fraction form
    226.36/312.29 = 138.98/x
  3. Step 3: Cross multiply
    226.36x = 312.29 × 138.98
  4. Step 4: Simplify right side
    226.36x = 43,402.67
  5. Step 5: Solve for x
    x = 43,402.67/226.36
  6. Step 6: Final answer
    x = 191.74

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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.