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Finding the Fourth Proportional to 583,280.40, 874,920.60 and 396,656.40

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Solution

The fourth proportional to 583,280.40, 874,920.60 and 396,656.40 is: 594,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,280.40 : 874,920.60 = 396,656.40 : x
  2. Step 2: Convert to fraction form
    583,280.40/874,920.60 = 396,656.40/x
  3. Step 3: Cross multiply
    583,280.40x = 874,920.60 × 396,656.40
  4. Step 4: Simplify right side
    583,280.40x = 347,042,855,481.84
  5. Step 5: Solve for x
    x = 347,042,855,481.84/583,280.40
  6. Step 6: Final answer
    x = 594,984.60

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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.