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Finding the Fourth Proportional to 342.48, 513.72 and 169.08

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Solution

The fourth proportional to 342.48, 513.72 and 169.08 is: 253.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.48 : 513.72 = 169.08 : x
  2. Step 2: Convert to fraction form
    342.48/513.72 = 169.08/x
  3. Step 3: Cross multiply
    342.48x = 513.72 × 169.08
  4. Step 4: Simplify right side
    342.48x = 86,859.78
  5. Step 5: Solve for x
    x = 86,859.78/342.48
  6. Step 6: Final answer
    x = 253.62

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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.