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Finding the Fourth Proportional to 379,912.38, 521,533.69 and 326,103.98

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Solution

The fourth proportional to 379,912.38, 521,533.69 and 326,103.98 is: 447,666.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,912.38 : 521,533.69 = 326,103.98 : x
  2. Step 2: Convert to fraction form
    379,912.38/521,533.69 = 326,103.98/x
  3. Step 3: Cross multiply
    379,912.38x = 521,533.69 × 326,103.98
  4. Step 4: Simplify right side
    379,912.38x = 170,074,208,590.16
  5. Step 5: Solve for x
    x = 170,074,208,590.16/379,912.38
  6. Step 6: Final answer
    x = 447,666.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.