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Finding the Fourth Proportional to 985,693.60, 1,478,194.80 and 512,221.60

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Solution

The fourth proportional to 985,693.60, 1,478,194.80 and 512,221.60 is: 768,152.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,693.60 : 1,478,194.80 = 512,221.60 : x
  2. Step 2: Convert to fraction form
    985,693.60/1,478,194.80 = 512,221.60/x
  3. Step 3: Cross multiply
    985,693.60x = 1,478,194.80 × 512,221.60
  4. Step 4: Simplify right side
    985,693.60x = 757,163,305,567.68
  5. Step 5: Solve for x
    x = 757,163,305,567.68/985,693.60
  6. Step 6: Final answer
    x = 768,152.81

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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.