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Finding the Fourth Proportional to 331.62, 456.60 and 256.98

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Solution

The fourth proportional to 331.62, 456.60 and 256.98 is: 353.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.62 : 456.60 = 256.98 : x
  2. Step 2: Convert to fraction form
    331.62/456.60 = 256.98/x
  3. Step 3: Cross multiply
    331.62x = 456.60 × 256.98
  4. Step 4: Simplify right side
    331.62x = 117,337.07
  5. Step 5: Solve for x
    x = 117,337.07/331.62
  6. Step 6: Final answer
    x = 353.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.