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Finding the Fourth Proportional to 281,673, 388,708.74 and 154,353.60

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Solution

The fourth proportional to 281,673, 388,708.74 and 154,353.60 is: 213,007.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,673 : 388,708.74 = 154,353.60 : x
  2. Step 2: Convert to fraction form
    281,673/388,708.74 = 154,353.60/x
  3. Step 3: Cross multiply
    281,673x = 388,708.74 × 154,353.60
  4. Step 4: Simplify right side
    281,673x = 59,998,593,370.46
  5. Step 5: Solve for x
    x = 59,998,593,370.46/281,673
  6. Step 6: Final answer
    x = 213,007.97

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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.