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Finding the Fourth Proportional to 612,779.20, 919,220.25 and 186,318.73

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Solution

The fourth proportional to 612,779.20, 919,220.25 and 186,318.73 is: 279,493.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,779.20 : 919,220.25 = 186,318.73 : x
  2. Step 2: Convert to fraction form
    612,779.20/919,220.25 = 186,318.73/x
  3. Step 3: Cross multiply
    612,779.20x = 919,220.25 × 186,318.73
  4. Step 4: Simplify right side
    612,779.20x = 171,267,947,272.23
  5. Step 5: Solve for x
    x = 171,267,947,272.23/612,779.20
  6. Step 6: Final answer
    x = 279,493.74

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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.