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Finding the Fourth Proportional to 361.70, 499.36 and 243.88

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Solution

The fourth proportional to 361.70, 499.36 and 243.88 is: 336.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.70 : 499.36 = 243.88 : x
  2. Step 2: Convert to fraction form
    361.70/499.36 = 243.88/x
  3. Step 3: Cross multiply
    361.70x = 499.36 × 243.88
  4. Step 4: Simplify right side
    361.70x = 121,783.92
  5. Step 5: Solve for x
    x = 121,783.92/361.70
  6. Step 6: Final answer
    x = 336.70

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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.