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Finding the Fourth Proportional to 281,382.80, 388,318.05 and 154,059.30

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Solution

The fourth proportional to 281,382.80, 388,318.05 and 154,059.30 is: 212,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,382.80 : 388,318.05 = 154,059.30 : x
  2. Step 2: Convert to fraction form
    281,382.80/388,318.05 = 154,059.30/x
  3. Step 3: Cross multiply
    281,382.80x = 388,318.05 × 154,059.30
  4. Step 4: Simplify right side
    281,382.80x = 59,824,006,960.37
  5. Step 5: Solve for x
    x = 59,824,006,960.37/281,382.80
  6. Step 6: Final answer
    x = 212,607.20

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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.