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Finding the Fourth Proportional to 806,696.20, 1,208,294.70 and 666,728.20

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Solution

The fourth proportional to 806,696.20, 1,208,294.70 and 666,728.20 is: 998,646.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,696.20 : 1,208,294.70 = 666,728.20 : x
  2. Step 2: Convert to fraction form
    806,696.20/1,208,294.70 = 666,728.20/x
  3. Step 3: Cross multiply
    806,696.20x = 1,208,294.70 × 666,728.20
  4. Step 4: Simplify right side
    806,696.20x = 805,604,150,400.54
  5. Step 5: Solve for x
    x = 805,604,150,400.54/806,696.20
  6. Step 6: Final answer
    x = 998,646.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.