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Finding the Fourth Proportional to 281,680.70, 388,706.68 and 154,353.56

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Solution

The fourth proportional to 281,680.70, 388,706.68 and 154,353.56 is: 213,000.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,680.70 : 388,706.68 = 154,353.56 : x
  2. Step 2: Convert to fraction form
    281,680.70/388,706.68 = 154,353.56/x
  3. Step 3: Cross multiply
    281,680.70x = 388,706.68 × 154,353.56
  4. Step 4: Simplify right side
    281,680.70x = 59,998,260,822.02
  5. Step 5: Solve for x
    x = 59,998,260,822.02/281,680.70
  6. Step 6: Final answer
    x = 213,000.96

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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.