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Finding the Fourth Proportional to 281,369.55, 388,274.67 and 154,020.54

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Solution

The fourth proportional to 281,369.55, 388,274.67 and 154,020.54 is: 212,539.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,369.55 : 388,274.67 = 154,020.54 : x
  2. Step 2: Convert to fraction form
    281,369.55/388,274.67 = 154,020.54/x
  3. Step 3: Cross multiply
    281,369.55x = 388,274.67 × 154,020.54
  4. Step 4: Simplify right side
    281,369.55x = 59,802,274,341.72
  5. Step 5: Solve for x
    x = 59,802,274,341.72/281,369.55
  6. Step 6: Final answer
    x = 212,539.97

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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.