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Finding the Fourth Proportional to 451.43, 622.85 and 274.25

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Solution

The fourth proportional to 451.43, 622.85 and 274.25 is: 378.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.43 : 622.85 = 274.25 : x
  2. Step 2: Convert to fraction form
    451.43/622.85 = 274.25/x
  3. Step 3: Cross multiply
    451.43x = 622.85 × 274.25
  4. Step 4: Simplify right side
    451.43x = 170,812.13
  5. Step 5: Solve for x
    x = 170,812.13/451.43
  6. Step 6: Final answer
    x = 378.38

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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.