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Finding the Fourth Proportional to 385.82, 579.15 and 203.16

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Solution

The fourth proportional to 385.82, 579.15 and 203.16 is: 304.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.82 : 579.15 = 203.16 : x
  2. Step 2: Convert to fraction form
    385.82/579.15 = 203.16/x
  3. Step 3: Cross multiply
    385.82x = 579.15 × 203.16
  4. Step 4: Simplify right side
    385.82x = 117,662.29
  5. Step 5: Solve for x
    x = 117,662.29/385.82
  6. Step 6: Final answer
    x = 304.97

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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.