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Finding the Fourth Proportional to 539,123.60, 808,685.40 and 512,879.60

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Solution

The fourth proportional to 539,123.60, 808,685.40 and 512,879.60 is: 769,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,123.60 : 808,685.40 = 512,879.60 : x
  2. Step 2: Convert to fraction form
    539,123.60/808,685.40 = 512,879.60/x
  3. Step 3: Cross multiply
    539,123.60x = 808,685.40 × 512,879.60
  4. Step 4: Simplify right side
    539,123.60x = 414,758,244,477.84
  5. Step 5: Solve for x
    x = 414,758,244,477.84/539,123.60
  6. Step 6: Final answer
    x = 769,319.40

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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.