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Finding the Fourth Proportional to 311,945.02, 430,379.43 and 254,485.02

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Solution

The fourth proportional to 311,945.02, 430,379.43 and 254,485.02 is: 351,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,945.02 : 430,379.43 = 254,485.02 : x
  2. Step 2: Convert to fraction form
    311,945.02/430,379.43 = 254,485.02/x
  3. Step 3: Cross multiply
    311,945.02x = 430,379.43 × 254,485.02
  4. Step 4: Simplify right side
    311,945.02x = 109,525,114,879.42
  5. Step 5: Solve for x
    x = 109,525,114,879.42/311,945.02
  6. Step 6: Final answer
    x = 351,103.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.