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Finding the Fourth Proportional to 256.52, 384.09 and 231.00

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Solution

The fourth proportional to 256.52, 384.09 and 231.00 is: 345.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.52 : 384.09 = 231.00 : x
  2. Step 2: Convert to fraction form
    256.52/384.09 = 231.00/x
  3. Step 3: Cross multiply
    256.52x = 384.09 × 231.00
  4. Step 4: Simplify right side
    256.52x = 88,725.94
  5. Step 5: Solve for x
    x = 88,725.94/256.52
  6. Step 6: Final answer
    x = 345.89

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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.