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Finding the Fourth Proportional to 256.23, 382.01 and 231.63

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Solution

The fourth proportional to 256.23, 382.01 and 231.63 is: 345.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.23 : 382.01 = 231.63 : x
  2. Step 2: Convert to fraction form
    256.23/382.01 = 231.63/x
  3. Step 3: Cross multiply
    256.23x = 382.01 × 231.63
  4. Step 4: Simplify right side
    256.23x = 88,484.98
  5. Step 5: Solve for x
    x = 88,484.98/256.23
  6. Step 6: Final answer
    x = 345.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.