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Finding the Fourth Proportional to 281,511.45, 388,468.31 and 154,179.45

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Solution

The fourth proportional to 281,511.45, 388,468.31 and 154,179.45 is: 212,758.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,511.45 : 388,468.31 = 154,179.45 : x
  2. Step 2: Convert to fraction form
    281,511.45/388,468.31 = 154,179.45/x
  3. Step 3: Cross multiply
    281,511.45x = 388,468.31 × 154,179.45
  4. Step 4: Simplify right side
    281,511.45x = 59,893,829,607.33
  5. Step 5: Solve for x
    x = 59,893,829,607.33/281,511.45
  6. Step 6: Final answer
    x = 212,758.06

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1.5x scale

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.