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Finding the Fourth Proportional to 286,040.40, 394,736.40 and 158,716.32

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Solution

The fourth proportional to 286,040.40, 394,736.40 and 158,716.32 is: 219,028.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,040.40 : 394,736.40 = 158,716.32 : x
  2. Step 2: Convert to fraction form
    286,040.40/394,736.40 = 158,716.32/x
  3. Step 3: Cross multiply
    286,040.40x = 394,736.40 × 158,716.32
  4. Step 4: Simplify right side
    286,040.40x = 62,651,108,778.05
  5. Step 5: Solve for x
    x = 62,651,108,778.05/286,040.40
  6. Step 6: Final answer
    x = 219,028.88

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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.