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Finding the Fourth Proportional to 667,912.60, 921,705.78 and 366,106.60

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Solution

The fourth proportional to 667,912.60, 921,705.78 and 366,106.60 is: 505,219.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,912.60 : 921,705.78 = 366,106.60 : x
  2. Step 2: Convert to fraction form
    667,912.60/921,705.78 = 366,106.60/x
  3. Step 3: Cross multiply
    667,912.60x = 921,705.78 × 366,106.60
  4. Step 4: Simplify right side
    667,912.60x = 337,442,569,316.15
  5. Step 5: Solve for x
    x = 337,442,569,316.15/667,912.60
  6. Step 6: Final answer
    x = 505,219.65

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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.