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Finding the Fourth Proportional to 344.37, 516.55 and 138.93

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Solution

The fourth proportional to 344.37, 516.55 and 138.93 is: 208.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.37 : 516.55 = 138.93 : x
  2. Step 2: Convert to fraction form
    344.37/516.55 = 138.93/x
  3. Step 3: Cross multiply
    344.37x = 516.55 × 138.93
  4. Step 4: Simplify right side
    344.37x = 71,763.60
  5. Step 5: Solve for x
    x = 71,763.60/344.37
  6. Step 6: Final answer
    x = 208.39

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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.