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Finding the Fourth Proportional to 665,968.12, 919,015.50 and 407,943.16

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Solution

The fourth proportional to 665,968.12, 919,015.50 and 407,943.16 is: 562,949.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,968.12 : 919,015.50 = 407,943.16 : x
  2. Step 2: Convert to fraction form
    665,968.12/919,015.50 = 407,943.16/x
  3. Step 3: Cross multiply
    665,968.12x = 919,015.50 × 407,943.16
  4. Step 4: Simplify right side
    665,968.12x = 374,906,087,158.98
  5. Step 5: Solve for x
    x = 374,906,087,158.98/665,968.12
  6. Step 6: Final answer
    x = 562,949.00

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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.