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Finding the Fourth Proportional to 699,616.74, 965,396.64 and 393,687.79

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Solution

The fourth proportional to 699,616.74, 965,396.64 and 393,687.79 is: 543,247.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,616.74 : 965,396.64 = 393,687.79 : x
  2. Step 2: Convert to fraction form
    699,616.74/965,396.64 = 393,687.79/x
  3. Step 3: Cross multiply
    699,616.74x = 965,396.64 × 393,687.79
  4. Step 4: Simplify right side
    699,616.74x = 380,064,869,675.03
  5. Step 5: Solve for x
    x = 380,064,869,675.03/699,616.74
  6. Step 6: Final answer
    x = 543,247.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.