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Finding the Fourth Proportional to 361.40, 498.46 and 306.44

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Solution

The fourth proportional to 361.40, 498.46 and 306.44 is: 422.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.40 : 498.46 = 306.44 : x
  2. Step 2: Convert to fraction form
    361.40/498.46 = 306.44/x
  3. Step 3: Cross multiply
    361.40x = 498.46 × 306.44
  4. Step 4: Simplify right side
    361.40x = 152,748.08
  5. Step 5: Solve for x
    x = 152,748.08/361.40
  6. Step 6: Final answer
    x = 422.66

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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.