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Finding the Fourth Proportional to 788.50, 1,183.66 and 615.36

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Solution

The fourth proportional to 788.50, 1,183.66 and 615.36 is: 923.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.50 : 1,183.66 = 615.36 : x
  2. Step 2: Convert to fraction form
    788.50/1,183.66 = 615.36/x
  3. Step 3: Cross multiply
    788.50x = 1,183.66 × 615.36
  4. Step 4: Simplify right side
    788.50x = 728,377.02
  5. Step 5: Solve for x
    x = 728,377.02/788.50
  6. Step 6: Final answer
    x = 923.75

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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.