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Finding the Fourth Proportional to 328,542.92, 493,021.69 and 128,857.97

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Solution

The fourth proportional to 328,542.92, 493,021.69 and 128,857.97 is: 193,368.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,542.92 : 493,021.69 = 128,857.97 : x
  2. Step 2: Convert to fraction form
    328,542.92/493,021.69 = 128,857.97/x
  3. Step 3: Cross multiply
    328,542.92x = 493,021.69 × 128,857.97
  4. Step 4: Simplify right side
    328,542.92x = 63,529,775,049.78
  5. Step 5: Solve for x
    x = 63,529,775,049.78/328,542.92
  6. Step 6: Final answer
    x = 193,368.27

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1.5x scale

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.