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Finding the Fourth Proportional to 786.75, 1,180.26 and 238.99

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Solution

The fourth proportional to 786.75, 1,180.26 and 238.99 is: 358.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.75 : 1,180.26 = 238.99 : x
  2. Step 2: Convert to fraction form
    786.75/1,180.26 = 238.99/x
  3. Step 3: Cross multiply
    786.75x = 1,180.26 × 238.99
  4. Step 4: Simplify right side
    786.75x = 282,067.39
  5. Step 5: Solve for x
    x = 282,067.39/786.75
  6. Step 6: Final answer
    x = 358.52

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Double scale
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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.