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Finding the Fourth Proportional to 281,878.54, 388,989.48 and 154,553.92

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Solution

The fourth proportional to 281,878.54, 388,989.48 and 154,553.92 is: 213,282.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,878.54 : 388,989.48 = 154,553.92 : x
  2. Step 2: Convert to fraction form
    281,878.54/388,989.48 = 154,553.92/x
  3. Step 3: Cross multiply
    281,878.54x = 388,989.48 × 154,553.92
  4. Step 4: Simplify right side
    281,878.54x = 60,119,848,972.76
  5. Step 5: Solve for x
    x = 60,119,848,972.76/281,878.54
  6. Step 6: Final answer
    x = 213,282.82

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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.