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Finding the Fourth Proportional to 666,889.29, 919,651.95 and 611,566.68

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Solution

The fourth proportional to 666,889.29, 919,651.95 and 611,566.68 is: 843,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,889.29 : 919,651.95 = 611,566.68 : x
  2. Step 2: Convert to fraction form
    666,889.29/919,651.95 = 611,566.68/x
  3. Step 3: Cross multiply
    666,889.29x = 919,651.95 × 611,566.68
  4. Step 4: Simplify right side
    666,889.29x = 562,428,489,817.03
  5. Step 5: Solve for x
    x = 562,428,489,817.03/666,889.29
  6. Step 6: Final answer
    x = 843,361.11

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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.