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Finding the Fourth Proportional to 281,376.11, 388,299.05 and 154,051.71

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Solution

The fourth proportional to 281,376.11, 388,299.05 and 154,051.71 is: 212,591.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,376.11 : 388,299.05 = 154,051.71 : x
  2. Step 2: Convert to fraction form
    281,376.11/388,299.05 = 154,051.71/x
  3. Step 3: Cross multiply
    281,376.11x = 388,299.05 × 154,051.71
  4. Step 4: Simplify right side
    281,376.11x = 59,818,131,873.62
  5. Step 5: Solve for x
    x = 59,818,131,873.62/281,376.11
  6. Step 6: Final answer
    x = 212,591.37

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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.