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Finding the Fourth Proportional to 3,596.75, 5,398.20 and 1,407

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Solution

The fourth proportional to 3,596.75, 5,398.20 and 1,407 is: 2,111.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,596.75 : 5,398.20 = 1,407 : x
  2. Step 2: Convert to fraction form
    3,596.75/5,398.20 = 1,407/x
  3. Step 3: Cross multiply
    3,596.75x = 5,398.20 × 1,407
  4. Step 4: Simplify right side
    3,596.75x = 7,595,267.40
  5. Step 5: Solve for x
    x = 7,595,267.40/3,596.75
  6. Step 6: Final answer
    x = 2,111.71

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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.