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Finding the Fourth Proportional to 412,040.09, 618,155.99 and 127,715.56

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Solution

The fourth proportional to 412,040.09, 618,155.99 and 127,715.56 is: 191,603.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,040.09 : 618,155.99 = 127,715.56 : x
  2. Step 2: Convert to fraction form
    412,040.09/618,155.99 = 127,715.56/x
  3. Step 3: Cross multiply
    412,040.09x = 618,155.99 × 127,715.56
  4. Step 4: Simplify right side
    412,040.09x = 78,948,138,430.20
  5. Step 5: Solve for x
    x = 78,948,138,430.20/412,040.09
  6. Step 6: Final answer
    x = 191,603.05

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1.5x scale

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.