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Finding the Fourth Proportional to 281,622, 388,638.36 and 154,300.53

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Solution

The fourth proportional to 281,622, 388,638.36 and 154,300.53 is: 212,934.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,622 : 388,638.36 = 154,300.53 : x
  2. Step 2: Convert to fraction form
    281,622/388,638.36 = 154,300.53/x
  3. Step 3: Cross multiply
    281,622x = 388,638.36 × 154,300.53
  4. Step 4: Simplify right side
    281,622x = 59,967,104,926.33
  5. Step 5: Solve for x
    x = 59,967,104,926.33/281,622
  6. Step 6: Final answer
    x = 212,934.73

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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.