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Finding the Fourth Proportional to 286,783.62, 395,761.62 and 157,724.13

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Solution

The fourth proportional to 286,783.62, 395,761.62 and 157,724.13 is: 217,659.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,783.62 : 395,761.62 = 157,724.13 : x
  2. Step 2: Convert to fraction form
    286,783.62/395,761.62 = 157,724.13/x
  3. Step 3: Cross multiply
    286,783.62x = 395,761.62 × 157,724.13
  4. Step 4: Simplify right side
    286,783.62x = 62,421,157,201.89
  5. Step 5: Solve for x
    x = 62,421,157,201.89/286,783.62
  6. Step 6: Final answer
    x = 217,659.42

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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.