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Finding the Fourth Proportional to 1,278,911.76, 1,764,919.88 and 698,164.84

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Solution

The fourth proportional to 1,278,911.76, 1,764,919.88 and 698,164.84 is: 963,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,911.76 : 1,764,919.88 = 698,164.84 : x
  2. Step 2: Convert to fraction form
    1,278,911.76/1,764,919.88 = 698,164.84/x
  3. Step 3: Cross multiply
    1,278,911.76x = 1,764,919.88 × 698,164.84
  4. Step 4: Simplify right side
    1,278,911.76x = 1,232,205,005,633.02
  5. Step 5: Solve for x
    x = 1,232,205,005,633.02/1,278,911.76
  6. Step 6: Final answer
    x = 963,479.30

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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.