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Finding the Fourth Proportional to 256.33, 383.31 and 190.57

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Solution

The fourth proportional to 256.33, 383.31 and 190.57 is: 284.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.33 : 383.31 = 190.57 : x
  2. Step 2: Convert to fraction form
    256.33/383.31 = 190.57/x
  3. Step 3: Cross multiply
    256.33x = 383.31 × 190.57
  4. Step 4: Simplify right side
    256.33x = 73,047.39
  5. Step 5: Solve for x
    x = 73,047.39/256.33
  6. Step 6: Final answer
    x = 284.97

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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.