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Finding the Fourth Proportional to 823.20, 1,234.63 and 238.07

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Solution

The fourth proportional to 823.20, 1,234.63 and 238.07 is: 357.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.20 : 1,234.63 = 238.07 : x
  2. Step 2: Convert to fraction form
    823.20/1,234.63 = 238.07/x
  3. Step 3: Cross multiply
    823.20x = 1,234.63 × 238.07
  4. Step 4: Simplify right side
    823.20x = 293,929.79
  5. Step 5: Solve for x
    x = 293,929.79/823.20
  6. Step 6: Final answer
    x = 357.06

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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.