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Finding the Fourth Proportional to 256.21, 384.24 and 230.39

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Solution

The fourth proportional to 256.21, 384.24 and 230.39 is: 345.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.21 : 384.24 = 230.39 : x
  2. Step 2: Convert to fraction form
    256.21/384.24 = 230.39/x
  3. Step 3: Cross multiply
    256.21x = 384.24 × 230.39
  4. Step 4: Simplify right side
    256.21x = 88,527.60
  5. Step 5: Solve for x
    x = 88,527.60/256.21
  6. Step 6: Final answer
    x = 345.52

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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.