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Finding the Fourth Proportional to 622.45, 857.75 and 444.91

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Solution

The fourth proportional to 622.45, 857.75 and 444.91 is: 613.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.45 : 857.75 = 444.91 : x
  2. Step 2: Convert to fraction form
    622.45/857.75 = 444.91/x
  3. Step 3: Cross multiply
    622.45x = 857.75 × 444.91
  4. Step 4: Simplify right side
    622.45x = 381,619.33
  5. Step 5: Solve for x
    x = 381,619.33/622.45
  6. Step 6: Final answer
    x = 613.09

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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.