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Finding the Fourth Proportional to 258.34, 389.41 and 236.43

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Solution

The fourth proportional to 258.34, 389.41 and 236.43 is: 356.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.34 : 389.41 = 236.43 : x
  2. Step 2: Convert to fraction form
    258.34/389.41 = 236.43/x
  3. Step 3: Cross multiply
    258.34x = 389.41 × 236.43
  4. Step 4: Simplify right side
    258.34x = 92,068.21
  5. Step 5: Solve for x
    x = 92,068.21/258.34
  6. Step 6: Final answer
    x = 356.38

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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.