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Finding the Fourth Proportional to 1,043,892,978.72, 1,439,235,029.16 and 855,025,495.80

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Solution

The fourth proportional to 1,043,892,978.72, 1,439,235,029.16 and 855,025,495.80 is: 1,178,839,851.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043,892,978.72 : 1,439,235,029.16 = 855,025,495.80 : x
  2. Step 2: Convert to fraction form
    1,043,892,978.72/1,439,235,029.16 = 855,025,495.80/x
  3. Step 3: Cross multiply
    1,043,892,978.72x = 1,439,235,029.16 × 855,025,495.80
  4. Step 4: Simplify right side
    1,043,892,978.72x = 1,230,582,644,380,256,512
  5. Step 5: Solve for x
    x = 1,230,582,644,380,256,512/1,043,892,978.72
  6. Step 6: Final answer
    x = 1,178,839,851.85

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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.