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Finding the Fourth Proportional to 408,890.63, 613,461.51 and 209,351.11

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Solution

The fourth proportional to 408,890.63, 613,461.51 and 209,351.11 is: 314,090.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,890.63 : 613,461.51 = 209,351.11 : x
  2. Step 2: Convert to fraction form
    408,890.63/613,461.51 = 209,351.11/x
  3. Step 3: Cross multiply
    408,890.63x = 613,461.51 × 209,351.11
  4. Step 4: Simplify right side
    408,890.63x = 128,428,848,827.60
  5. Step 5: Solve for x
    x = 128,428,848,827.60/408,890.63
  6. Step 6: Final answer
    x = 314,090.96

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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.