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Finding the Fourth Proportional to 651,609.20, 977,413.80 and 385,232.60

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Solution

The fourth proportional to 651,609.20, 977,413.80 and 385,232.60 is: 577,848.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,609.20 : 977,413.80 = 385,232.60 : x
  2. Step 2: Convert to fraction form
    651,609.20/977,413.80 = 385,232.60/x
  3. Step 3: Cross multiply
    651,609.20x = 977,413.80 × 385,232.60
  4. Step 4: Simplify right side
    651,609.20x = 376,531,659,449.88
  5. Step 5: Solve for x
    x = 376,531,659,449.88/651,609.20
  6. Step 6: Final answer
    x = 577,848.90

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.