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Finding the Fourth Proportional to 328,892.20, 493,043.02 and 129,355.79

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Solution

The fourth proportional to 328,892.20, 493,043.02 and 129,355.79 is: 193,917.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,892.20 : 493,043.02 = 129,355.79 : x
  2. Step 2: Convert to fraction form
    328,892.20/493,043.02 = 129,355.79/x
  3. Step 3: Cross multiply
    328,892.20x = 493,043.02 × 129,355.79
  4. Step 4: Simplify right side
    328,892.20x = 63,777,966,567.48
  5. Step 5: Solve for x
    x = 63,777,966,567.48/328,892.20
  6. Step 6: Final answer
    x = 193,917.54

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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.