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Finding the Fourth Proportional to 321,311.10, 481,505.85 and 236,408.70

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Solution

The fourth proportional to 321,311.10, 481,505.85 and 236,408.70 is: 354,274.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,311.10 : 481,505.85 = 236,408.70 : x
  2. Step 2: Convert to fraction form
    321,311.10/481,505.85 = 236,408.70/x
  3. Step 3: Cross multiply
    321,311.10x = 481,505.85 × 236,408.70
  4. Step 4: Simplify right side
    321,311.10x = 113,832,172,040.90
  5. Step 5: Solve for x
    x = 113,832,172,040.90/321,311.10
  6. Step 6: Final answer
    x = 354,274.01

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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.