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Finding the Fourth Proportional to 383,317.75, 528,956.49 and 219,939.67

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Solution

The fourth proportional to 383,317.75, 528,956.49 and 219,939.67 is: 303,504.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,317.75 : 528,956.49 = 219,939.67 : x
  2. Step 2: Convert to fraction form
    383,317.75/528,956.49 = 219,939.67/x
  3. Step 3: Cross multiply
    383,317.75x = 528,956.49 × 219,939.67
  4. Step 4: Simplify right side
    383,317.75x = 116,338,515,854.96
  5. Step 5: Solve for x
    x = 116,338,515,854.96/383,317.75
  6. Step 6: Final answer
    x = 303,504.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.