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Finding the Fourth Proportional to 412,779.30, 619,063.65 and 128,414.22

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Solution

The fourth proportional to 412,779.30, 619,063.65 and 128,414.22 is: 192,588.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,779.30 : 619,063.65 = 128,414.22 : x
  2. Step 2: Convert to fraction form
    412,779.30/619,063.65 = 128,414.22/x
  3. Step 3: Cross multiply
    412,779.30x = 619,063.65 × 128,414.22
  4. Step 4: Simplify right side
    412,779.30x = 79,496,575,745.10
  5. Step 5: Solve for x
    x = 79,496,575,745.10/412,779.30
  6. Step 6: Final answer
    x = 192,588.57

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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.