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Finding the Fourth Proportional to 788.26, 1,184.79 and 769.78

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Solution

The fourth proportional to 788.26, 1,184.79 and 769.78 is: 1,157.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.26 : 1,184.79 = 769.78 : x
  2. Step 2: Convert to fraction form
    788.26/1,184.79 = 769.78/x
  3. Step 3: Cross multiply
    788.26x = 1,184.79 × 769.78
  4. Step 4: Simplify right side
    788.26x = 912,027.65
  5. Step 5: Solve for x
    x = 912,027.65/788.26
  6. Step 6: Final answer
    x = 1,157.01

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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.