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Finding the Fourth Proportional to 419.70, 628.97 and 361.53

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Solution

The fourth proportional to 419.70, 628.97 and 361.53 is: 541.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.70 : 628.97 = 361.53 : x
  2. Step 2: Convert to fraction form
    419.70/628.97 = 361.53/x
  3. Step 3: Cross multiply
    419.70x = 628.97 × 361.53
  4. Step 4: Simplify right side
    419.70x = 227,392.43
  5. Step 5: Solve for x
    x = 227,392.43/419.70
  6. Step 6: Final answer
    x = 541.80

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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.