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Finding the Fourth Proportional to 328,871.92, 493,108.12 and 128,952.79

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Solution

The fourth proportional to 328,871.92, 493,108.12 and 128,952.79 is: 193,350.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,871.92 : 493,108.12 = 128,952.79 : x
  2. Step 2: Convert to fraction form
    328,871.92/493,108.12 = 128,952.79/x
  3. Step 3: Cross multiply
    328,871.92x = 493,108.12 × 128,952.79
  4. Step 4: Simplify right side
    328,871.92x = 63,587,667,845.65
  5. Step 5: Solve for x
    x = 63,587,667,845.65/328,871.92
  6. Step 6: Final answer
    x = 193,350.86

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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.