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Finding the Fourth Proportional to 788.56, 1,183.56 and 605.36

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Solution

The fourth proportional to 788.56, 1,183.56 and 605.36 is: 908.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.56 : 1,183.56 = 605.36 : x
  2. Step 2: Convert to fraction form
    788.56/1,183.56 = 605.36/x
  3. Step 3: Cross multiply
    788.56x = 1,183.56 × 605.36
  4. Step 4: Simplify right side
    788.56x = 716,479.88
  5. Step 5: Solve for x
    x = 716,479.88/788.56
  6. Step 6: Final answer
    x = 908.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.