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Finding the Fourth Proportional to 622.20, 940.68 and 622.20

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Solution

The fourth proportional to 622.20, 940.68 and 622.20 is: 940.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.20 : 940.68 = 622.20 : x
  2. Step 2: Convert to fraction form
    622.20/940.68 = 622.20/x
  3. Step 3: Cross multiply
    622.20x = 940.68 × 622.20
  4. Step 4: Simplify right side
    622.20x = 585,291.10
  5. Step 5: Solve for x
    x = 585,291.10/622.20
  6. Step 6: Final answer
    x = 940.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.