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Finding the Fourth Proportional to 344.21, 516.38 and 100.74

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Solution

The fourth proportional to 344.21, 516.38 and 100.74 is: 151.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.21 : 516.38 = 100.74 : x
  2. Step 2: Convert to fraction form
    344.21/516.38 = 100.74/x
  3. Step 3: Cross multiply
    344.21x = 516.38 × 100.74
  4. Step 4: Simplify right side
    344.21x = 52,021.55
  5. Step 5: Solve for x
    x = 52,021.55/344.21
  6. Step 6: Final answer
    x = 151.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.