Home / 491,180,544.47-678,135,112.24-312,665,194.61

Finding the Fourth Proportional to 491,180,544.47, 678,135,112.24 and 312,665,194.61

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Solution

The fourth proportional to 491,180,544.47, 678,135,112.24 and 312,665,194.61 is: 431,672,730.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,180,544.47 : 678,135,112.24 = 312,665,194.61 : x
  2. Step 2: Convert to fraction form
    491,180,544.47/678,135,112.24 = 312,665,194.61/x
  3. Step 3: Cross multiply
    491,180,544.47x = 678,135,112.24 × 312,665,194.61
  4. Step 4: Simplify right side
    491,180,544.47x = 212,029,246,840,393,792
  5. Step 5: Solve for x
    x = 212,029,246,840,393,792/491,180,544.47
  6. Step 6: Final answer
    x = 431,672,730.58

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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.