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Finding the Fourth Proportional to 1,891,641.40, 2,837,807.70 and 769,823.80

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Solution

The fourth proportional to 1,891,641.40, 2,837,807.70 and 769,823.80 is: 1,154,876.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891,641.40 : 2,837,807.70 = 769,823.80 : x
  2. Step 2: Convert to fraction form
    1,891,641.40/2,837,807.70 = 769,823.80/x
  3. Step 3: Cross multiply
    1,891,641.40x = 2,837,807.70 × 769,823.80
  4. Step 4: Simplify right side
    1,891,641.40x = 2,184,611,907,283.26
  5. Step 5: Solve for x
    x = 2,184,611,907,283.26/1,891,641.40
  6. Step 6: Final answer
    x = 1,154,876.35

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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.