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Finding the Fourth Proportional to 2,416.84, 3,625.17 and 685.42

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Solution

The fourth proportional to 2,416.84, 3,625.17 and 685.42 is: 1,028.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,416.84 : 3,625.17 = 685.42 : x
  2. Step 2: Convert to fraction form
    2,416.84/3,625.17 = 685.42/x
  3. Step 3: Cross multiply
    2,416.84x = 3,625.17 × 685.42
  4. Step 4: Simplify right side
    2,416.84x = 2,484,764.02
  5. Step 5: Solve for x
    x = 2,484,764.02/2,416.84
  6. Step 6: Final answer
    x = 1,028.10

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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.