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Finding the Fourth Proportional to 788.32, 1,183.11 and 355.51

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Solution

The fourth proportional to 788.32, 1,183.11 and 355.51 is: 533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.32 : 1,183.11 = 355.51 : x
  2. Step 2: Convert to fraction form
    788.32/1,183.11 = 355.51/x
  3. Step 3: Cross multiply
    788.32x = 1,183.11 × 355.51
  4. Step 4: Simplify right side
    788.32x = 420,607.44
  5. Step 5: Solve for x
    x = 420,607.44/788.32
  6. Step 6: Final answer
    x = 533.55

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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.