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Finding the Fourth Proportional to 254.38, 350.87 and 156.19

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Solution

The fourth proportional to 254.38, 350.87 and 156.19 is: 215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.38 : 350.87 = 156.19 : x
  2. Step 2: Convert to fraction form
    254.38/350.87 = 156.19/x
  3. Step 3: Cross multiply
    254.38x = 350.87 × 156.19
  4. Step 4: Simplify right side
    254.38x = 54,802.39
  5. Step 5: Solve for x
    x = 54,802.39/254.38
  6. Step 6: Final answer
    x = 215.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.