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Finding the Fourth Proportional to 281,231.80, 388,100.46 and 153,908.44

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Solution

The fourth proportional to 281,231.80, 388,100.46 and 153,908.44 is: 212,393.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,231.80 : 388,100.46 = 153,908.44 : x
  2. Step 2: Convert to fraction form
    281,231.80/388,100.46 = 153,908.44/x
  3. Step 3: Cross multiply
    281,231.80x = 388,100.46 × 153,908.44
  4. Step 4: Simplify right side
    281,231.80x = 59,731,936,361.88
  5. Step 5: Solve for x
    x = 59,731,936,361.88/281,231.80
  6. Step 6: Final answer
    x = 212,393.96

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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.