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Finding the Fourth Proportional to 788.44, 1,086.23 and 622.59

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Solution

The fourth proportional to 788.44, 1,086.23 and 622.59 is: 857.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.44 : 1,086.23 = 622.59 : x
  2. Step 2: Convert to fraction form
    788.44/1,086.23 = 622.59/x
  3. Step 3: Cross multiply
    788.44x = 1,086.23 × 622.59
  4. Step 4: Simplify right side
    788.44x = 676,277.49
  5. Step 5: Solve for x
    x = 676,277.49/788.44
  6. Step 6: Final answer
    x = 857.74

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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.