Home / 1,114,921,336.38-1,538,631,895.89-638,703,743.12

Finding the Fourth Proportional to 1,114,921,336.38, 1,538,631,895.89 and 638,703,743.12

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Solution

The fourth proportional to 1,114,921,336.38, 1,538,631,895.89 and 638,703,743.12 is: 881,434,339.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114,921,336.38 : 1,538,631,895.89 = 638,703,743.12 : x
  2. Step 2: Convert to fraction form
    1,114,921,336.38/1,538,631,895.89 = 638,703,743.12/x
  3. Step 3: Cross multiply
    1,114,921,336.38x = 1,538,631,895.89 × 638,703,743.12
  4. Step 4: Simplify right side
    1,114,921,336.38x = 982,729,951,189,204,992
  5. Step 5: Solve for x
    x = 982,729,951,189,204,992/1,114,921,336.38
  6. Step 6: Final answer
    x = 881,434,339.02

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Double scale
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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.