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Finding the Fourth Proportional to 668,665.21, 922,515.83 and 439,346.01

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Solution

The fourth proportional to 668,665.21, 922,515.83 and 439,346.01 is: 606,138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,665.21 : 922,515.83 = 439,346.01 : x
  2. Step 2: Convert to fraction form
    668,665.21/922,515.83 = 439,346.01/x
  3. Step 3: Cross multiply
    668,665.21x = 922,515.83 × 439,346.01
  4. Step 4: Simplify right side
    668,665.21x = 405,303,649,072.34
  5. Step 5: Solve for x
    x = 405,303,649,072.34/668,665.21
  6. Step 6: Final answer
    x = 606,138.38

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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.