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Finding the Fourth Proportional to 226.98, 312.75 and 210.78

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Solution

The fourth proportional to 226.98, 312.75 and 210.78 is: 290.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.98 : 312.75 = 210.78 : x
  2. Step 2: Convert to fraction form
    226.98/312.75 = 210.78/x
  3. Step 3: Cross multiply
    226.98x = 312.75 × 210.78
  4. Step 4: Simplify right side
    226.98x = 65,921.45
  5. Step 5: Solve for x
    x = 65,921.45/226.98
  6. Step 6: Final answer
    x = 290.43

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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.