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Finding the Fourth Proportional to 250, 344.95 and 139.47

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Solution

The fourth proportional to 250, 344.95 and 139.47 is: 192.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    250 : 344.95 = 139.47 : x
  2. Step 2: Convert to fraction form
    250/344.95 = 139.47/x
  3. Step 3: Cross multiply
    250x = 344.95 × 139.47
  4. Step 4: Simplify right side
    250x = 48,110.18
  5. Step 5: Solve for x
    x = 48,110.18/250
  6. Step 6: Final answer
    x = 192.44

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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.