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Finding the Fourth Proportional to 788.69, 1,183.22 and 355.61

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Solution

The fourth proportional to 788.69, 1,183.22 and 355.61 is: 533.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.69 : 1,183.22 = 355.61 : x
  2. Step 2: Convert to fraction form
    788.69/1,183.22 = 355.61/x
  3. Step 3: Cross multiply
    788.69x = 1,183.22 × 355.61
  4. Step 4: Simplify right side
    788.69x = 420,764.86
  5. Step 5: Solve for x
    x = 420,764.86/788.69
  6. Step 6: Final answer
    x = 533.50

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1.5x scale

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.