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Finding the Fourth Proportional to 614,440.80, 923,043.60 and 427,816.80

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Solution

The fourth proportional to 614,440.80, 923,043.60 and 427,816.80 is: 642,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,440.80 : 923,043.60 = 427,816.80 : x
  2. Step 2: Convert to fraction form
    614,440.80/923,043.60 = 427,816.80/x
  3. Step 3: Cross multiply
    614,440.80x = 923,043.60 × 427,816.80
  4. Step 4: Simplify right side
    614,440.80x = 394,893,559,212.48
  5. Step 5: Solve for x
    x = 394,893,559,212.48/614,440.80
  6. Step 6: Final answer
    x = 642,687.72

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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.