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Finding the Fourth Proportional to 342.65, 513.90 and 137.16

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Solution

The fourth proportional to 342.65, 513.90 and 137.16 is: 205.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.65 : 513.90 = 137.16 : x
  2. Step 2: Convert to fraction form
    342.65/513.90 = 137.16/x
  3. Step 3: Cross multiply
    342.65x = 513.90 × 137.16
  4. Step 4: Simplify right side
    342.65x = 70,486.52
  5. Step 5: Solve for x
    x = 70,486.52/342.65
  6. Step 6: Final answer
    x = 205.71

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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.