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Finding the Fourth Proportional to 342.81, 513.63 and 205.83

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Solution

The fourth proportional to 342.81, 513.63 and 205.83 is: 308.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.81 : 513.63 = 205.83 : x
  2. Step 2: Convert to fraction form
    342.81/513.63 = 205.83/x
  3. Step 3: Cross multiply
    342.81x = 513.63 × 205.83
  4. Step 4: Simplify right side
    342.81x = 105,720.46
  5. Step 5: Solve for x
    x = 105,720.46/342.81
  6. Step 6: Final answer
    x = 308.39

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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.