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Finding the Fourth Proportional to 666,196.65, 919,360.64 and 375,821.64

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Solution

The fourth proportional to 666,196.65, 919,360.64 and 375,821.64 is: 518,639.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,196.65 : 919,360.64 = 375,821.64 : x
  2. Step 2: Convert to fraction form
    666,196.65/919,360.64 = 375,821.64/x
  3. Step 3: Cross multiply
    666,196.65x = 919,360.64 × 375,821.64
  4. Step 4: Simplify right side
    666,196.65x = 345,515,624,415.80
  5. Step 5: Solve for x
    x = 345,515,624,415.80/666,196.65
  6. Step 6: Final answer
    x = 518,639.09

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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.