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Finding the Fourth Proportional to 281,693.89, 388,740.63 and 154,366.75

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Solution

The fourth proportional to 281,693.89, 388,740.63 and 154,366.75 is: 213,027.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,693.89 : 388,740.63 = 154,366.75 : x
  2. Step 2: Convert to fraction form
    281,693.89/388,740.63 = 154,366.75/x
  3. Step 3: Cross multiply
    281,693.89x = 388,740.63 × 154,366.75
  4. Step 4: Simplify right side
    281,693.89x = 60,008,627,646.05
  5. Step 5: Solve for x
    x = 60,008,627,646.05/281,693.89
  6. Step 6: Final answer
    x = 213,027.79

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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.