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Finding the Fourth Proportional to 639,193.92, 957,870.36 and 439,739.52

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Solution

The fourth proportional to 639,193.92, 957,870.36 and 439,739.52 is: 658,976.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,193.92 : 957,870.36 = 439,739.52 : x
  2. Step 2: Convert to fraction form
    639,193.92/957,870.36 = 439,739.52/x
  3. Step 3: Cross multiply
    639,193.92x = 957,870.36 × 439,739.52
  4. Step 4: Simplify right side
    639,193.92x = 421,213,452,328.63
  5. Step 5: Solve for x
    x = 421,213,452,328.63/639,193.92
  6. Step 6: Final answer
    x = 658,976.00

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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.