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Finding the Fourth Proportional to 256.82, 385.08 and 235.05

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Solution

The fourth proportional to 256.82, 385.08 and 235.05 is: 352.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.82 : 385.08 = 235.05 : x
  2. Step 2: Convert to fraction form
    256.82/385.08 = 235.05/x
  3. Step 3: Cross multiply
    256.82x = 385.08 × 235.05
  4. Step 4: Simplify right side
    256.82x = 90,513.05
  5. Step 5: Solve for x
    x = 90,513.05/256.82
  6. Step 6: Final answer
    x = 352.44

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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.