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Finding the Fourth Proportional to 395.63, 593.12 and 256.95

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Solution

The fourth proportional to 395.63, 593.12 and 256.95 is: 385.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.63 : 593.12 = 256.95 : x
  2. Step 2: Convert to fraction form
    395.63/593.12 = 256.95/x
  3. Step 3: Cross multiply
    395.63x = 593.12 × 256.95
  4. Step 4: Simplify right side
    395.63x = 152,402.18
  5. Step 5: Solve for x
    x = 152,402.18/395.63
  6. Step 6: Final answer
    x = 385.21

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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.