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Finding the Fourth Proportional to 515,015.44, 710,709 and 285,571.60

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Solution

The fourth proportional to 515,015.44, 710,709 and 285,571.60 is: 394,081.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,015.44 : 710,709 = 285,571.60 : x
  2. Step 2: Convert to fraction form
    515,015.44/710,709 = 285,571.60/x
  3. Step 3: Cross multiply
    515,015.44x = 710,709 × 285,571.60
  4. Step 4: Simplify right side
    515,015.44x = 202,958,306,264.40
  5. Step 5: Solve for x
    x = 202,958,306,264.40/515,015.44
  6. Step 6: Final answer
    x = 394,081.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.