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Finding the Fourth Proportional to 250.73, 346 and 138.69

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Solution

The fourth proportional to 250.73, 346 and 138.69 is: 191.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.73 : 346 = 138.69 : x
  2. Step 2: Convert to fraction form
    250.73/346 = 138.69/x
  3. Step 3: Cross multiply
    250.73x = 346 × 138.69
  4. Step 4: Simplify right side
    250.73x = 47,986.74
  5. Step 5: Solve for x
    x = 47,986.74/250.73
  6. Step 6: Final answer
    x = 191.39

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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.