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Finding the Fourth Proportional to 622.20, 859.02 and 426.12

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Solution

The fourth proportional to 622.20, 859.02 and 426.12 is: 588.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.20 : 859.02 = 426.12 : x
  2. Step 2: Convert to fraction form
    622.20/859.02 = 426.12/x
  3. Step 3: Cross multiply
    622.20x = 859.02 × 426.12
  4. Step 4: Simplify right side
    622.20x = 366,045.60
  5. Step 5: Solve for x
    x = 366,045.60/622.20
  6. Step 6: Final answer
    x = 588.31

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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.