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Finding the Fourth Proportional to 451.21, 622.72 and 254.69

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Solution

The fourth proportional to 451.21, 622.72 and 254.69 is: 351.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.21 : 622.72 = 254.69 : x
  2. Step 2: Convert to fraction form
    451.21/622.72 = 254.69/x
  3. Step 3: Cross multiply
    451.21x = 622.72 × 254.69
  4. Step 4: Simplify right side
    451.21x = 158,596.81
  5. Step 5: Solve for x
    x = 158,596.81/451.21
  6. Step 6: Final answer
    x = 351.49

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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.