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Finding the Fourth Proportional to 328,568.96, 492,664.80 and 128,655.29

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Solution

The fourth proportional to 328,568.96, 492,664.80 and 128,655.29 is: 192,909.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,568.96 : 492,664.80 = 128,655.29 : x
  2. Step 2: Convert to fraction form
    328,568.96/492,664.80 = 128,655.29/x
  3. Step 3: Cross multiply
    328,568.96x = 492,664.80 × 128,655.29
  4. Step 4: Simplify right side
    328,568.96x = 63,383,932,716.79
  5. Step 5: Solve for x
    x = 63,383,932,716.79/328,568.96
  6. Step 6: Final answer
    x = 192,909.07

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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.