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Finding the Fourth Proportional to 383,318, 528,956.84 and 219,939.92

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Solution

The fourth proportional to 383,318, 528,956.84 and 219,939.92 is: 303,504.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,318 : 528,956.84 = 219,939.92 : x
  2. Step 2: Convert to fraction form
    383,318/528,956.84 = 219,939.92/x
  3. Step 3: Cross multiply
    383,318x = 528,956.84 × 219,939.92
  4. Step 4: Simplify right side
    383,318x = 116,338,723,973.35
  5. Step 5: Solve for x
    x = 116,338,723,973.35/383,318
  6. Step 6: Final answer
    x = 303,504.46

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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.