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Finding the Fourth Proportional to 1,289,671.09, 1,934,506.60 and 578,868.75

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Solution

The fourth proportional to 1,289,671.09, 1,934,506.60 and 578,868.75 is: 868,303.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,671.09 : 1,934,506.60 = 578,868.75 : x
  2. Step 2: Convert to fraction form
    1,289,671.09/1,934,506.60 = 578,868.75/x
  3. Step 3: Cross multiply
    1,289,671.09x = 1,934,506.60 × 578,868.75
  4. Step 4: Simplify right side
    1,289,671.09x = 1,119,825,415,961.58
  5. Step 5: Solve for x
    x = 1,119,825,415,961.58/1,289,671.09
  6. Step 6: Final answer
    x = 868,303.11

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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.