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Finding the Fourth Proportional to 450.23, 621.33 and 251.09

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Solution

The fourth proportional to 450.23, 621.33 and 251.09 is: 346.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.23 : 621.33 = 251.09 : x
  2. Step 2: Convert to fraction form
    450.23/621.33 = 251.09/x
  3. Step 3: Cross multiply
    450.23x = 621.33 × 251.09
  4. Step 4: Simplify right side
    450.23x = 156,006.64
  5. Step 5: Solve for x
    x = 156,006.64/450.23
  6. Step 6: Final answer
    x = 346.50

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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.