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Finding the Fourth Proportional to 788.75, 1,181.89 and 301.53

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Solution

The fourth proportional to 788.75, 1,181.89 and 301.53 is: 451.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.75 : 1,181.89 = 301.53 : x
  2. Step 2: Convert to fraction form
    788.75/1,181.89 = 301.53/x
  3. Step 3: Cross multiply
    788.75x = 1,181.89 × 301.53
  4. Step 4: Simplify right side
    788.75x = 356,375.29
  5. Step 5: Solve for x
    x = 356,375.29/788.75
  6. Step 6: Final answer
    x = 451.82

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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.