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Finding the Fourth Proportional to 233.58, 351.64 and 212.39

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Solution

The fourth proportional to 233.58, 351.64 and 212.39 is: 319.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.58 : 351.64 = 212.39 : x
  2. Step 2: Convert to fraction form
    233.58/351.64 = 212.39/x
  3. Step 3: Cross multiply
    233.58x = 351.64 × 212.39
  4. Step 4: Simplify right side
    233.58x = 74,684.65
  5. Step 5: Solve for x
    x = 74,684.65/233.58
  6. Step 6: Final answer
    x = 319.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.