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Finding the Fourth Proportional to 407,986.06, 611,978.98 and 127,503.32

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Solution

The fourth proportional to 407,986.06, 611,978.98 and 127,503.32 is: 191,254.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,986.06 : 611,978.98 = 127,503.32 : x
  2. Step 2: Convert to fraction form
    407,986.06/611,978.98 = 127,503.32/x
  3. Step 3: Cross multiply
    407,986.06x = 611,978.98 × 127,503.32
  4. Step 4: Simplify right side
    407,986.06x = 78,029,351,720.21
  5. Step 5: Solve for x
    x = 78,029,351,720.21/407,986.06
  6. Step 6: Final answer
    x = 191,254.95

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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.