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Finding the Fourth Proportional to 311,721.54, 430,175.54 and 168,481.59

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Solution

The fourth proportional to 311,721.54, 430,175.54 and 168,481.59 is: 232,504.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,721.54 : 430,175.54 = 168,481.59 : x
  2. Step 2: Convert to fraction form
    311,721.54/430,175.54 = 168,481.59/x
  3. Step 3: Cross multiply
    311,721.54x = 430,175.54 × 168,481.59
  4. Step 4: Simplify right side
    311,721.54x = 72,476,658,958.31
  5. Step 5: Solve for x
    x = 72,476,658,958.31/311,721.54
  6. Step 6: Final answer
    x = 232,504.49

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1.5x scale

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.