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Finding the Fourth Proportional to 407,768.13, 611,652.20 and 127,309.41

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Solution

The fourth proportional to 407,768.13, 611,652.20 and 127,309.41 is: 190,964.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,768.13 : 611,652.20 = 127,309.41 : x
  2. Step 2: Convert to fraction form
    407,768.13/611,652.20 = 127,309.41/x
  3. Step 3: Cross multiply
    407,768.13x = 611,652.20 × 127,309.41
  4. Step 4: Simplify right side
    407,768.13x = 77,869,080,070.66
  5. Step 5: Solve for x
    x = 77,869,080,070.66/407,768.13
  6. Step 6: Final answer
    x = 190,964.12

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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.