Home / 721,607,040.78-995,817,716.34-391,582,179.78

Finding the Fourth Proportional to 721,607,040.78, 995,817,716.34 and 391,582,179.78

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Solution

The fourth proportional to 721,607,040.78, 995,817,716.34 and 391,582,179.78 is: 540,383,408.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,607,040.78 : 995,817,716.34 = 391,582,179.78 : x
  2. Step 2: Convert to fraction form
    721,607,040.78/995,817,716.34 = 391,582,179.78/x
  3. Step 3: Cross multiply
    721,607,040.78x = 995,817,716.34 × 391,582,179.78
  4. Step 4: Simplify right side
    721,607,040.78x = 389,944,472,027,958,912
  5. Step 5: Solve for x
    x = 389,944,472,027,958,912/721,607,040.78
  6. Step 6: Final answer
    x = 540,383,408.13

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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.