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Finding the Fourth Proportional to 250.17, 345.21 and 143.83

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Solution

The fourth proportional to 250.17, 345.21 and 143.83 is: 198.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.17 : 345.21 = 143.83 : x
  2. Step 2: Convert to fraction form
    250.17/345.21 = 143.83/x
  3. Step 3: Cross multiply
    250.17x = 345.21 × 143.83
  4. Step 4: Simplify right side
    250.17x = 49,651.55
  5. Step 5: Solve for x
    x = 49,651.55/250.17
  6. Step 6: Final answer
    x = 198.47

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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.