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Finding the Fourth Proportional to 405,905.10, 569,511.30 and 405,905.10

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Solution

The fourth proportional to 405,905.10, 569,511.30 and 405,905.10 is: 569,511.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,905.10 : 569,511.30 = 405,905.10 : x
  2. Step 2: Convert to fraction form
    405,905.10/569,511.30 = 405,905.10/x
  3. Step 3: Cross multiply
    405,905.10x = 569,511.30 × 405,905.10
  4. Step 4: Simplify right side
    405,905.10x = 231,167,541,177.63
  5. Step 5: Solve for x
    x = 231,167,541,177.63/405,905.10
  6. Step 6: Final answer
    x = 569,511.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.