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Finding the Fourth Proportional to 285,878.49, 394,515.39 and 158,562.28

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Solution

The fourth proportional to 285,878.49, 394,515.39 and 158,562.28 is: 218,817.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,878.49 : 394,515.39 = 158,562.28 : x
  2. Step 2: Convert to fraction form
    285,878.49/394,515.39 = 158,562.28/x
  3. Step 3: Cross multiply
    285,878.49x = 394,515.39 × 158,562.28
  4. Step 4: Simplify right side
    285,878.49x = 62,555,259,733.49
  5. Step 5: Solve for x
    x = 62,555,259,733.49/285,878.49
  6. Step 6: Final answer
    x = 218,817.65

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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.