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Finding the Fourth Proportional to 615,846.40, 923,769.60 and 405,721.60

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Solution

The fourth proportional to 615,846.40, 923,769.60 and 405,721.60 is: 608,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,846.40 : 923,769.60 = 405,721.60 : x
  2. Step 2: Convert to fraction form
    615,846.40/923,769.60 = 405,721.60/x
  3. Step 3: Cross multiply
    615,846.40x = 923,769.60 × 405,721.60
  4. Step 4: Simplify right side
    615,846.40x = 374,793,280,143.36
  5. Step 5: Solve for x
    x = 374,793,280,143.36/615,846.40
  6. Step 6: Final answer
    x = 608,582.40

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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.