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Finding the Fourth Proportional to 353,992.48, 530,669.88 and 129,195.18

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Solution

The fourth proportional to 353,992.48, 530,669.88 and 129,195.18 is: 193,676.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,992.48 : 530,669.88 = 129,195.18 : x
  2. Step 2: Convert to fraction form
    353,992.48/530,669.88 = 129,195.18/x
  3. Step 3: Cross multiply
    353,992.48x = 530,669.88 × 129,195.18
  4. Step 4: Simplify right side
    353,992.48x = 68,559,990,667.18
  5. Step 5: Solve for x
    x = 68,559,990,667.18/353,992.48
  6. Step 6: Final answer
    x = 193,676.41

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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.