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Finding the Fourth Proportional to 451.30, 622.62 and 285.22

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Solution

The fourth proportional to 451.30, 622.62 and 285.22 is: 393.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.30 : 622.62 = 285.22 : x
  2. Step 2: Convert to fraction form
    451.30/622.62 = 285.22/x
  3. Step 3: Cross multiply
    451.30x = 622.62 × 285.22
  4. Step 4: Simplify right side
    451.30x = 177,583.68
  5. Step 5: Solve for x
    x = 177,583.68/451.30
  6. Step 6: Final answer
    x = 393.49

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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.