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Finding the Fourth Proportional to 805,987.20, 1,207,231.20 and 666,019.20

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Solution

The fourth proportional to 805,987.20, 1,207,231.20 and 666,019.20 is: 997,583.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,987.20 : 1,207,231.20 = 666,019.20 : x
  2. Step 2: Convert to fraction form
    805,987.20/1,207,231.20 = 666,019.20/x
  3. Step 3: Cross multiply
    805,987.20x = 1,207,231.20 × 666,019.20
  4. Step 4: Simplify right side
    805,987.20x = 804,039,158,039.04
  5. Step 5: Solve for x
    x = 804,039,158,039.04/805,987.20
  6. Step 6: Final answer
    x = 997,583.04

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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.