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Finding the Fourth Proportional to 328,998.78, 493,515.72 and 104,377.19

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Solution

The fourth proportional to 328,998.78, 493,515.72 and 104,377.19 is: 156,571.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,998.78 : 493,515.72 = 104,377.19 : x
  2. Step 2: Convert to fraction form
    328,998.78/493,515.72 = 104,377.19/x
  3. Step 3: Cross multiply
    328,998.78x = 493,515.72 × 104,377.19
  4. Step 4: Simplify right side
    328,998.78x = 51,511,781,606.85
  5. Step 5: Solve for x
    x = 51,511,781,606.85/328,998.78
  6. Step 6: Final answer
    x = 156,571.35

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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.