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Finding the Fourth Proportional to 620,873.67, 857,456.17 and 427,783.44

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Solution

The fourth proportional to 620,873.67, 857,456.17 and 427,783.44 is: 590,789.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,873.67 : 857,456.17 = 427,783.44 : x
  2. Step 2: Convert to fraction form
    620,873.67/857,456.17 = 427,783.44/x
  3. Step 3: Cross multiply
    620,873.67x = 857,456.17 × 427,783.44
  4. Step 4: Simplify right side
    620,873.67x = 366,805,548,982.37
  5. Step 5: Solve for x
    x = 366,805,548,982.37/620,873.67
  6. Step 6: Final answer
    x = 590,789.35

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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.