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Finding the Fourth Proportional to 330.56, 495.42 and 265.76

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Solution

The fourth proportional to 330.56, 495.42 and 265.76 is: 398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.56 : 495.42 = 265.76 : x
  2. Step 2: Convert to fraction form
    330.56/495.42 = 265.76/x
  3. Step 3: Cross multiply
    330.56x = 495.42 × 265.76
  4. Step 4: Simplify right side
    330.56x = 131,662.82
  5. Step 5: Solve for x
    x = 131,662.82/330.56
  6. Step 6: Final answer
    x = 398.30

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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.