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Finding the Fourth Proportional to 666,988.70, 919,822.62 and 617,449.03

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Solution

The fourth proportional to 666,988.70, 919,822.62 and 617,449.03 is: 851,504.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,988.70 : 919,822.62 = 617,449.03 : x
  2. Step 2: Convert to fraction form
    666,988.70/919,822.62 = 617,449.03/x
  3. Step 3: Cross multiply
    666,988.70x = 919,822.62 × 617,449.03
  4. Step 4: Simplify right side
    666,988.70x = 567,943,584,491.06
  5. Step 5: Solve for x
    x = 567,943,584,491.06/666,988.70
  6. Step 6: Final answer
    x = 851,504.06

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1.5x scale

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.