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Finding the Fourth Proportional to 286,768.80, 429,764.40 and 191,728.80

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Solution

The fourth proportional to 286,768.80, 429,764.40 and 191,728.80 is: 287,333.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,768.80 : 429,764.40 = 191,728.80 : x
  2. Step 2: Convert to fraction form
    286,768.80/429,764.40 = 191,728.80/x
  3. Step 3: Cross multiply
    286,768.80x = 429,764.40 × 191,728.80
  4. Step 4: Simplify right side
    286,768.80x = 82,398,212,694.72
  5. Step 5: Solve for x
    x = 82,398,212,694.72/286,768.80
  6. Step 6: Final answer
    x = 287,333.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.