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Finding the Fourth Proportional to 258.06, 385.89 and 193.10

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Solution

The fourth proportional to 258.06, 385.89 and 193.10 is: 288.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.06 : 385.89 = 193.10 : x
  2. Step 2: Convert to fraction form
    258.06/385.89 = 193.10/x
  3. Step 3: Cross multiply
    258.06x = 385.89 × 193.10
  4. Step 4: Simplify right side
    258.06x = 74,513.43
  5. Step 5: Solve for x
    x = 74,513.43/258.06
  6. Step 6: Final answer
    x = 288.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.