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Finding the Fourth Proportional to 1,869,414.80, 2,805,965.40 and 923,853.20

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Solution

The fourth proportional to 1,869,414.80, 2,805,965.40 and 923,853.20 is: 1,386,690.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869,414.80 : 2,805,965.40 = 923,853.20 : x
  2. Step 2: Convert to fraction form
    1,869,414.80/2,805,965.40 = 923,853.20/x
  3. Step 3: Cross multiply
    1,869,414.80x = 2,805,965.40 × 923,853.20
  4. Step 4: Simplify right side
    1,869,414.80x = 2,592,300,113,879.28
  5. Step 5: Solve for x
    x = 2,592,300,113,879.28/1,869,414.80
  6. Step 6: Final answer
    x = 1,386,690.70

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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.