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Finding the Fourth Proportional to 622.40, 851.22 and 606.20

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Solution

The fourth proportional to 622.40, 851.22 and 606.20 is: 829.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.40 : 851.22 = 606.20 : x
  2. Step 2: Convert to fraction form
    622.40/851.22 = 606.20/x
  3. Step 3: Cross multiply
    622.40x = 851.22 × 606.20
  4. Step 4: Simplify right side
    622.40x = 516,006.53
  5. Step 5: Solve for x
    x = 516,006.53/622.40
  6. Step 6: Final answer
    x = 829.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.