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Finding the Fourth Proportional to 666,987.70, 919,821.25 and 617,448.03

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Solution

The fourth proportional to 666,987.70, 919,821.25 and 617,448.03 is: 851,502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,987.70 : 919,821.25 = 617,448.03 : x
  2. Step 2: Convert to fraction form
    666,987.70/919,821.25 = 617,448.03/x
  3. Step 3: Cross multiply
    666,987.70x = 919,821.25 × 617,448.03
  4. Step 4: Simplify right side
    666,987.70x = 567,941,816,063.30
  5. Step 5: Solve for x
    x = 567,941,816,063.30/666,987.70
  6. Step 6: Final answer
    x = 851,502.69

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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.