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Finding the Fourth Proportional to 612,010.60, 918,015.90 and 191,285.80

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Solution

The fourth proportional to 612,010.60, 918,015.90 and 191,285.80 is: 286,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,010.60 : 918,015.90 = 191,285.80 : x
  2. Step 2: Convert to fraction form
    612,010.60/918,015.90 = 191,285.80/x
  3. Step 3: Cross multiply
    612,010.60x = 918,015.90 × 191,285.80
  4. Step 4: Simplify right side
    612,010.60x = 175,603,405,844.22
  5. Step 5: Solve for x
    x = 175,603,405,844.22/612,010.60
  6. Step 6: Final answer
    x = 286,928.70

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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.