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Finding the Fourth Proportional to 259.38, 386.58 and 251.90

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Solution

The fourth proportional to 259.38, 386.58 and 251.90 is: 375.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.38 : 386.58 = 251.90 : x
  2. Step 2: Convert to fraction form
    259.38/386.58 = 251.90/x
  3. Step 3: Cross multiply
    259.38x = 386.58 × 251.90
  4. Step 4: Simplify right side
    259.38x = 97,377.57
  5. Step 5: Solve for x
    x = 97,377.57/259.38
  6. Step 6: Final answer
    x = 375.42

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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.