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Finding the Fourth Proportional to 321,128.40, 481,692.60 and 227,816.40

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Solution

The fourth proportional to 321,128.40, 481,692.60 and 227,816.40 is: 341,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,128.40 : 481,692.60 = 227,816.40 : x
  2. Step 2: Convert to fraction form
    321,128.40/481,692.60 = 227,816.40/x
  3. Step 3: Cross multiply
    321,128.40x = 481,692.60 × 227,816.40
  4. Step 4: Simplify right side
    321,128.40x = 109,737,474,038.64
  5. Step 5: Solve for x
    x = 109,737,474,038.64/321,128.40
  6. Step 6: Final answer
    x = 341,724.60

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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.