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Finding the Fourth Proportional to 256.21, 384.24 and 73.56

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Solution

The fourth proportional to 256.21, 384.24 and 73.56 is: 110.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.21 : 384.24 = 73.56 : x
  2. Step 2: Convert to fraction form
    256.21/384.24 = 73.56/x
  3. Step 3: Cross multiply
    256.21x = 384.24 × 73.56
  4. Step 4: Simplify right side
    256.21x = 28,262.41
  5. Step 5: Solve for x
    x = 28,262.41/256.21
  6. Step 6: Final answer
    x = 110.31

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.