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Finding the Fourth Proportional to 559.78, 838.29 and 385.96

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Solution

The fourth proportional to 559.78, 838.29 and 385.96 is: 577.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.78 : 838.29 = 385.96 : x
  2. Step 2: Convert to fraction form
    559.78/838.29 = 385.96/x
  3. Step 3: Cross multiply
    559.78x = 838.29 × 385.96
  4. Step 4: Simplify right side
    559.78x = 323,544.31
  5. Step 5: Solve for x
    x = 323,544.31/559.78
  6. Step 6: Final answer
    x = 577.99

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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.