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Finding the Fourth Proportional to 788.45, 1,181.71 and 349.23

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Solution

The fourth proportional to 788.45, 1,181.71 and 349.23 is: 523.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.45 : 1,181.71 = 349.23 : x
  2. Step 2: Convert to fraction form
    788.45/1,181.71 = 349.23/x
  3. Step 3: Cross multiply
    788.45x = 1,181.71 × 349.23
  4. Step 4: Simplify right side
    788.45x = 412,688.58
  5. Step 5: Solve for x
    x = 412,688.58/788.45
  6. Step 6: Final answer
    x = 523.42

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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.