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Finding the Fourth Proportional to 619,376.80, 930,015.60 and 339,440.80

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Solution

The fourth proportional to 619,376.80, 930,015.60 and 339,440.80 is: 509,682.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,376.80 : 930,015.60 = 339,440.80 : x
  2. Step 2: Convert to fraction form
    619,376.80/930,015.60 = 339,440.80/x
  3. Step 3: Cross multiply
    619,376.80x = 930,015.60 × 339,440.80
  4. Step 4: Simplify right side
    619,376.80x = 315,685,239,276.48
  5. Step 5: Solve for x
    x = 315,685,239,276.48/619,376.80
  6. Step 6: Final answer
    x = 509,682.05

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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.