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Finding the Fourth Proportional to 386,469.60, 579,704.40 and 106,015.20

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Solution

The fourth proportional to 386,469.60, 579,704.40 and 106,015.20 is: 159,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,469.60 : 579,704.40 = 106,015.20 : x
  2. Step 2: Convert to fraction form
    386,469.60/579,704.40 = 106,015.20/x
  3. Step 3: Cross multiply
    386,469.60x = 579,704.40 × 106,015.20
  4. Step 4: Simplify right side
    386,469.60x = 61,457,477,906.88
  5. Step 5: Solve for x
    x = 61,457,477,906.88/386,469.60
  6. Step 6: Final answer
    x = 159,022.80

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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.