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Finding the Fourth Proportional to 353,546.80, 530,414.54 and 128,927.68

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Solution

The fourth proportional to 353,546.80, 530,414.54 and 128,927.68 is: 193,425.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,546.80 : 530,414.54 = 128,927.68 : x
  2. Step 2: Convert to fraction form
    353,546.80/530,414.54 = 128,927.68/x
  3. Step 3: Cross multiply
    353,546.80x = 530,414.54 × 128,927.68
  4. Step 4: Simplify right side
    353,546.80x = 68,385,116,080.47
  5. Step 5: Solve for x
    x = 68,385,116,080.47/353,546.80
  6. Step 6: Final answer
    x = 193,425.92

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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.