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Finding the Fourth Proportional to 258.18, 385.19 and 251.16

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Solution

The fourth proportional to 258.18, 385.19 and 251.16 is: 374.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.18 : 385.19 = 251.16 : x
  2. Step 2: Convert to fraction form
    258.18/385.19 = 251.16/x
  3. Step 3: Cross multiply
    258.18x = 385.19 × 251.16
  4. Step 4: Simplify right side
    258.18x = 96,743.06
  5. Step 5: Solve for x
    x = 96,743.06/258.18
  6. Step 6: Final answer
    x = 374.71

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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.