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Finding the Fourth Proportional to 639,169.79, 882,373.64 and 397,530.25

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Solution

The fourth proportional to 639,169.79, 882,373.64 and 397,530.25 is: 548,790.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,169.79 : 882,373.64 = 397,530.25 : x
  2. Step 2: Convert to fraction form
    639,169.79/882,373.64 = 397,530.25/x
  3. Step 3: Cross multiply
    639,169.79x = 882,373.64 × 397,530.25
  4. Step 4: Simplify right side
    639,169.79x = 350,770,209,509.03
  5. Step 5: Solve for x
    x = 350,770,209,509.03/639,169.79
  6. Step 6: Final answer
    x = 548,790.35

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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.