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Finding the Fourth Proportional to 256.14, 384.01 and 126.09

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Solution

The fourth proportional to 256.14, 384.01 and 126.09 is: 189.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.14 : 384.01 = 126.09 : x
  2. Step 2: Convert to fraction form
    256.14/384.01 = 126.09/x
  3. Step 3: Cross multiply
    256.14x = 384.01 × 126.09
  4. Step 4: Simplify right side
    256.14x = 48,420.95
  5. Step 5: Solve for x
    x = 48,420.95/256.14
  6. Step 6: Final answer
    x = 189.04

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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.