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Finding the Fourth Proportional to 312,157.56, 430,778.59 and 168,917.60

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Solution

The fourth proportional to 312,157.56, 430,778.59 and 168,917.60 is: 233,106.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,157.56 : 430,778.59 = 168,917.60 : x
  2. Step 2: Convert to fraction form
    312,157.56/430,778.59 = 168,917.60/x
  3. Step 3: Cross multiply
    312,157.56x = 430,778.59 × 168,917.60
  4. Step 4: Simplify right side
    312,157.56x = 72,766,086,208.84
  5. Step 5: Solve for x
    x = 72,766,086,208.84/312,157.56
  6. Step 6: Final answer
    x = 233,106.91

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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.