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Finding the Fourth Proportional to 342.38, 513.53 and 159.65

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Solution

The fourth proportional to 342.38, 513.53 and 159.65 is: 239.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.38 : 513.53 = 159.65 : x
  2. Step 2: Convert to fraction form
    342.38/513.53 = 159.65/x
  3. Step 3: Cross multiply
    342.38x = 513.53 × 159.65
  4. Step 4: Simplify right side
    342.38x = 81,985.55
  5. Step 5: Solve for x
    x = 81,985.55/342.38
  6. Step 6: Final answer
    x = 239.46

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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.