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Finding the Fourth Proportional to 395.77, 593.97 and 258.78

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Solution

The fourth proportional to 395.77, 593.97 and 258.78 is: 388.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.77 : 593.97 = 258.78 : x
  2. Step 2: Convert to fraction form
    395.77/593.97 = 258.78/x
  3. Step 3: Cross multiply
    395.77x = 593.97 × 258.78
  4. Step 4: Simplify right side
    395.77x = 153,707.56
  5. Step 5: Solve for x
    x = 153,707.56/395.77
  6. Step 6: Final answer
    x = 388.38

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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.