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Finding the Fourth Proportional to 328,873.92, 493,111.12 and 128,954.79

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Solution

The fourth proportional to 328,873.92, 493,111.12 and 128,954.79 is: 193,353.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,873.92 : 493,111.12 = 128,954.79 : x
  2. Step 2: Convert to fraction form
    328,873.92/493,111.12 = 128,954.79/x
  3. Step 3: Cross multiply
    328,873.92x = 493,111.12 × 128,954.79
  4. Step 4: Simplify right side
    328,873.92x = 63,589,040,926.26
  5. Step 5: Solve for x
    x = 63,589,040,926.26/328,873.92
  6. Step 6: Final answer
    x = 193,353.86

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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.