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Finding the Fourth Proportional to 1,318,685,787.20, 1,978,028,680.80 and 336,110,427.20

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Solution

The fourth proportional to 1,318,685,787.20, 1,978,028,680.80 and 336,110,427.20 is: 504,165,640.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,685,787.20 : 1,978,028,680.80 = 336,110,427.20 : x
  2. Step 2: Convert to fraction form
    1,318,685,787.20/1,978,028,680.80 = 336,110,427.20/x
  3. Step 3: Cross multiply
    1,318,685,787.20x = 1,978,028,680.80 × 336,110,427.20
  4. Step 4: Simplify right side
    1,318,685,787.20x = 664,836,064,917,540,352
  5. Step 5: Solve for x
    x = 664,836,064,917,540,352/1,318,685,787.20
  6. Step 6: Final answer
    x = 504,165,640.80

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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.