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Finding the Fourth Proportional to 1,398,684, 1,930,181.06 and 786,837.20

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Solution

The fourth proportional to 1,398,684, 1,930,181.06 and 786,837.20 is: 1,085,833.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,684 : 1,930,181.06 = 786,837.20 : x
  2. Step 2: Convert to fraction form
    1,398,684/1,930,181.06 = 786,837.20/x
  3. Step 3: Cross multiply
    1,398,684x = 1,930,181.06 × 786,837.20
  4. Step 4: Simplify right side
    1,398,684x = 1,518,738,260,743.43
  5. Step 5: Solve for x
    x = 1,518,738,260,743.43/1,398,684
  6. Step 6: Final answer
    x = 1,085,833.73

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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.