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Finding the Fourth Proportional to 226.98, 313.38 and 139.80

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Solution

The fourth proportional to 226.98, 313.38 and 139.80 is: 193.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.98 : 313.38 = 139.80 : x
  2. Step 2: Convert to fraction form
    226.98/313.38 = 139.80/x
  3. Step 3: Cross multiply
    226.98x = 313.38 × 139.80
  4. Step 4: Simplify right side
    226.98x = 43,810.52
  5. Step 5: Solve for x
    x = 43,810.52/226.98
  6. Step 6: Final answer
    x = 193.01

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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.