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Finding the Fourth Proportional to 342.39, 513.75 and 159.91

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Solution

The fourth proportional to 342.39, 513.75 and 159.91 is: 239.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.39 : 513.75 = 159.91 : x
  2. Step 2: Convert to fraction form
    342.39/513.75 = 159.91/x
  3. Step 3: Cross multiply
    342.39x = 513.75 × 159.91
  4. Step 4: Simplify right side
    342.39x = 82,153.76
  5. Step 5: Solve for x
    x = 82,153.76/342.39
  6. Step 6: Final answer
    x = 239.94

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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.