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Finding the Fourth Proportional to 450.70, 621.89 and 254.21

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Solution

The fourth proportional to 450.70, 621.89 and 254.21 is: 350.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.70 : 621.89 = 254.21 : x
  2. Step 2: Convert to fraction form
    450.70/621.89 = 254.21/x
  3. Step 3: Cross multiply
    450.70x = 621.89 × 254.21
  4. Step 4: Simplify right side
    450.70x = 158,087.55
  5. Step 5: Solve for x
    x = 158,087.55/450.70
  6. Step 6: Final answer
    x = 350.76

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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.