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Finding the Fourth Proportional to 786.09, 1,178.82 and 238.08

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Solution

The fourth proportional to 786.09, 1,178.82 and 238.08 is: 357.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.09 : 1,178.82 = 238.08 : x
  2. Step 2: Convert to fraction form
    786.09/1,178.82 = 238.08/x
  3. Step 3: Cross multiply
    786.09x = 1,178.82 × 238.08
  4. Step 4: Simplify right side
    786.09x = 280,653.47
  5. Step 5: Solve for x
    x = 280,653.47/786.09
  6. Step 6: Final answer
    x = 357.02

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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.