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Finding the Fourth Proportional to 1,278,775.86, 1,764,584.94 and 705,779.11

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Solution

The fourth proportional to 1,278,775.86, 1,764,584.94 and 705,779.11 is: 973,905.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,775.86 : 1,764,584.94 = 705,779.11 : x
  2. Step 2: Convert to fraction form
    1,278,775.86/1,764,584.94 = 705,779.11/x
  3. Step 3: Cross multiply
    1,278,775.86x = 1,764,584.94 × 705,779.11
  4. Step 4: Simplify right side
    1,278,775.86x = 1,245,407,188,472.60
  5. Step 5: Solve for x
    x = 1,245,407,188,472.60/1,278,775.86
  6. Step 6: Final answer
    x = 973,905.77

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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.