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Finding the Fourth Proportional to 342.15, 513.30 and 125.73

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Solution

The fourth proportional to 342.15, 513.30 and 125.73 is: 188.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.15 : 513.30 = 125.73 : x
  2. Step 2: Convert to fraction form
    342.15/513.30 = 125.73/x
  3. Step 3: Cross multiply
    342.15x = 513.30 × 125.73
  4. Step 4: Simplify right side
    342.15x = 64,537.21
  5. Step 5: Solve for x
    x = 64,537.21/342.15
  6. Step 6: Final answer
    x = 188.62

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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.