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Finding the Fourth Proportional to 331.80, 497.70 and 270.78

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Solution

The fourth proportional to 331.80, 497.70 and 270.78 is: 406.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.80 : 497.70 = 270.78 : x
  2. Step 2: Convert to fraction form
    331.80/497.70 = 270.78/x
  3. Step 3: Cross multiply
    331.80x = 497.70 × 270.78
  4. Step 4: Simplify right side
    331.80x = 134,767.21
  5. Step 5: Solve for x
    x = 134,767.21/331.80
  6. Step 6: Final answer
    x = 406.17

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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.