Home / 728,511,147.15-1,005,348,391.29-393,983,662.32

Finding the Fourth Proportional to 728,511,147.15, 1,005,348,391.29 and 393,983,662.32

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Solution

The fourth proportional to 728,511,147.15, 1,005,348,391.29 and 393,983,662.32 is: 543,699,080.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,511,147.15 : 1,005,348,391.29 = 393,983,662.32 : x
  2. Step 2: Convert to fraction form
    728,511,147.15/1,005,348,391.29 = 393,983,662.32/x
  3. Step 3: Cross multiply
    728,511,147.15x = 1,005,348,391.29 × 393,983,662.32
  4. Step 4: Simplify right side
    728,511,147.15x = 396,090,841,107,954,560
  5. Step 5: Solve for x
    x = 396,090,841,107,954,560/728,511,147.15
  6. Step 6: Final answer
    x = 543,699,080.87

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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.