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Finding the Fourth Proportional to 613,918.80, 920,878.20 and 193,323.60

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Solution

The fourth proportional to 613,918.80, 920,878.20 and 193,323.60 is: 289,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,918.80 : 920,878.20 = 193,323.60 : x
  2. Step 2: Convert to fraction form
    613,918.80/920,878.20 = 193,323.60/x
  3. Step 3: Cross multiply
    613,918.80x = 920,878.20 × 193,323.60
  4. Step 4: Simplify right side
    613,918.80x = 178,027,488,785.52
  5. Step 5: Solve for x
    x = 178,027,488,785.52/613,918.80
  6. Step 6: Final answer
    x = 289,985.40

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