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Finding the Fourth Proportional to 618,961.58, 928,704.90 and 338,150.78

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Solution

The fourth proportional to 618,961.58, 928,704.90 and 338,150.78 is: 507,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,961.58 : 928,704.90 = 338,150.78 : x
  2. Step 2: Convert to fraction form
    618,961.58/928,704.90 = 338,150.78/x
  3. Step 3: Cross multiply
    618,961.58x = 928,704.90 × 338,150.78
  4. Step 4: Simplify right side
    618,961.58x = 314,042,286,324.82
  5. Step 5: Solve for x
    x = 314,042,286,324.82/618,961.58
  6. Step 6: Final answer
    x = 507,369.60

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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.