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Finding the Fourth Proportional to 233.84, 349 and 213.28

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Solution

The fourth proportional to 233.84, 349 and 213.28 is: 318.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.84 : 349 = 213.28 : x
  2. Step 2: Convert to fraction form
    233.84/349 = 213.28/x
  3. Step 3: Cross multiply
    233.84x = 349 × 213.28
  4. Step 4: Simplify right side
    233.84x = 74,434.72
  5. Step 5: Solve for x
    x = 74,434.72/233.84
  6. Step 6: Final answer
    x = 318.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.