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Finding the Fourth Proportional to 395.12, 592.70 and 138.62

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Solution

The fourth proportional to 395.12, 592.70 and 138.62 is: 207.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.12 : 592.70 = 138.62 : x
  2. Step 2: Convert to fraction form
    395.12/592.70 = 138.62/x
  3. Step 3: Cross multiply
    395.12x = 592.70 × 138.62
  4. Step 4: Simplify right side
    395.12x = 82,160.07
  5. Step 5: Solve for x
    x = 82,160.07/395.12
  6. Step 6: Final answer
    x = 207.94

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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.