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Finding the Fourth Proportional to 666,609.85, 919,921.00 and 376,282.53

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Solution

The fourth proportional to 666,609.85, 919,921.00 and 376,282.53 is: 519,269.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,609.85 : 919,921.00 = 376,282.53 : x
  2. Step 2: Convert to fraction form
    666,609.85/919,921.00 = 376,282.53/x
  3. Step 3: Cross multiply
    666,609.85x = 919,921.00 × 376,282.53
  4. Step 4: Simplify right side
    666,609.85x = 346,150,194,799.11
  5. Step 5: Solve for x
    x = 346,150,194,799.11/666,609.85
  6. Step 6: Final answer
    x = 519,269.55

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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.