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Finding the Fourth Proportional to 331,376.40, 457,310.88 and 188,131.68

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Solution

The fourth proportional to 331,376.40, 457,310.88 and 188,131.68 is: 259,628.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,376.40 : 457,310.88 = 188,131.68 : x
  2. Step 2: Convert to fraction form
    331,376.40/457,310.88 = 188,131.68/x
  3. Step 3: Cross multiply
    331,376.40x = 457,310.88 × 188,131.68
  4. Step 4: Simplify right side
    331,376.40x = 86,034,664,136.68
  5. Step 5: Solve for x
    x = 86,034,664,136.68/331,376.40
  6. Step 6: Final answer
    x = 259,628.22

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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.