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Finding the Fourth Proportional to 342.12, 513.15 and 125.67

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Solution

The fourth proportional to 342.12, 513.15 and 125.67 is: 188.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.12 : 513.15 = 125.67 : x
  2. Step 2: Convert to fraction form
    342.12/513.15 = 125.67/x
  3. Step 3: Cross multiply
    342.12x = 513.15 × 125.67
  4. Step 4: Simplify right side
    342.12x = 64,487.56
  5. Step 5: Solve for x
    x = 64,487.56/342.12
  6. Step 6: Final answer
    x = 188.49

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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.