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Finding the Fourth Proportional to 823.07, 1,234.62 and 335.78

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Solution

The fourth proportional to 823.07, 1,234.62 and 335.78 is: 503.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.07 : 1,234.62 = 335.78 : x
  2. Step 2: Convert to fraction form
    823.07/1,234.62 = 335.78/x
  3. Step 3: Cross multiply
    823.07x = 1,234.62 × 335.78
  4. Step 4: Simplify right side
    823.07x = 414,554.53
  5. Step 5: Solve for x
    x = 414,554.53/823.07
  6. Step 6: Final answer
    x = 503.67

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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.