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Finding the Fourth Proportional to 615,811.40, 923,717.10 and 405,571.40

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Solution

The fourth proportional to 615,811.40, 923,717.10 and 405,571.40 is: 608,357.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,811.40 : 923,717.10 = 405,571.40 : x
  2. Step 2: Convert to fraction form
    615,811.40/923,717.10 = 405,571.40/x
  3. Step 3: Cross multiply
    615,811.40x = 923,717.10 × 405,571.40
  4. Step 4: Simplify right side
    615,811.40x = 374,633,237,450.94
  5. Step 5: Solve for x
    x = 374,633,237,450.94/615,811.40
  6. Step 6: Final answer
    x = 608,357.10

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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.