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Finding the Fourth Proportional to 685,652.39, 945,886.21 and 444,012.79

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Solution

The fourth proportional to 685,652.39, 945,886.21 and 444,012.79 is: 612,534.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,652.39 : 945,886.21 = 444,012.79 : x
  2. Step 2: Convert to fraction form
    685,652.39/945,886.21 = 444,012.79/x
  3. Step 3: Cross multiply
    685,652.39x = 945,886.21 × 444,012.79
  4. Step 4: Simplify right side
    685,652.39x = 419,985,573,423.42
  5. Step 5: Solve for x
    x = 419,985,573,423.42/685,652.39
  6. Step 6: Final answer
    x = 612,534.25

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Half scale
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Double scale
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Similar ratio
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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.