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Finding the Fourth Proportional to 395.80, 593.70 and 135.83

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Solution

The fourth proportional to 395.80, 593.70 and 135.83 is: 203.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.80 : 593.70 = 135.83 : x
  2. Step 2: Convert to fraction form
    395.80/593.70 = 135.83/x
  3. Step 3: Cross multiply
    395.80x = 593.70 × 135.83
  4. Step 4: Simplify right side
    395.80x = 80,642.27
  5. Step 5: Solve for x
    x = 80,642.27/395.80
  6. Step 6: Final answer
    x = 203.75

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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.