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Finding the Fourth Proportional to 233.66, 320.67 and 211.79

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Solution

The fourth proportional to 233.66, 320.67 and 211.79 is: 290.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.66 : 320.67 = 211.79 : x
  2. Step 2: Convert to fraction form
    233.66/320.67 = 211.79/x
  3. Step 3: Cross multiply
    233.66x = 320.67 × 211.79
  4. Step 4: Simplify right side
    233.66x = 67,914.70
  5. Step 5: Solve for x
    x = 67,914.70/233.66
  6. Step 6: Final answer
    x = 290.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.