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Finding the Fourth Proportional to 479,812, 662,198.88 and 278,608

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Solution

The fourth proportional to 479,812, 662,198.88 and 278,608 is: 384,512.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,812 : 662,198.88 = 278,608 : x
  2. Step 2: Convert to fraction form
    479,812/662,198.88 = 278,608/x
  3. Step 3: Cross multiply
    479,812x = 662,198.88 × 278,608
  4. Step 4: Simplify right side
    479,812x = 184,493,905,559.04
  5. Step 5: Solve for x
    x = 184,493,905,559.04/479,812
  6. Step 6: Final answer
    x = 384,512.90

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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.