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Finding the Fourth Proportional to 412,272.30, 618,408.45 and 318,845.10

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Solution

The fourth proportional to 412,272.30, 618,408.45 and 318,845.10 is: 478,267.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,272.30 : 618,408.45 = 318,845.10 : x
  2. Step 2: Convert to fraction form
    412,272.30/618,408.45 = 318,845.10/x
  3. Step 3: Cross multiply
    412,272.30x = 618,408.45 × 318,845.10
  4. Step 4: Simplify right side
    412,272.30x = 197,176,504,081.10
  5. Step 5: Solve for x
    x = 197,176,504,081.10/412,272.30
  6. Step 6: Final answer
    x = 478,267.65

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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.