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Finding the Fourth Proportional to 285,084.36, 393,410.79 and 157,759.92

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Solution

The fourth proportional to 285,084.36, 393,410.79 and 157,759.92 is: 217,705.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,084.36 : 393,410.79 = 157,759.92 : x
  2. Step 2: Convert to fraction form
    285,084.36/393,410.79 = 157,759.92/x
  3. Step 3: Cross multiply
    285,084.36x = 393,410.79 × 157,759.92
  4. Step 4: Simplify right side
    285,084.36x = 62,064,454,757.54
  5. Step 5: Solve for x
    x = 62,064,454,757.54/285,084.36
  6. Step 6: Final answer
    x = 217,705.58

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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.