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Finding the Fourth Proportional to 685,305.87, 943,609.77 and 608,691.84

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Solution

The fourth proportional to 685,305.87, 943,609.77 and 608,691.84 is: 838,118.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,305.87 : 943,609.77 = 608,691.84 : x
  2. Step 2: Convert to fraction form
    685,305.87/943,609.77 = 608,691.84/x
  3. Step 3: Cross multiply
    685,305.87x = 943,609.77 × 608,691.84
  4. Step 4: Simplify right side
    685,305.87x = 574,367,567,143.28
  5. Step 5: Solve for x
    x = 574,367,567,143.28/685,305.87
  6. Step 6: Final answer
    x = 838,118.56

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Double scale
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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.