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Finding the Fourth Proportional to 412,840.80, 619,347.60 and 132,386.40

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Solution

The fourth proportional to 412,840.80, 619,347.60 and 132,386.40 is: 198,607.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,840.80 : 619,347.60 = 132,386.40 : x
  2. Step 2: Convert to fraction form
    412,840.80/619,347.60 = 132,386.40/x
  3. Step 3: Cross multiply
    412,840.80x = 619,347.60 × 132,386.40
  4. Step 4: Simplify right side
    412,840.80x = 81,993,199,112.64
  5. Step 5: Solve for x
    x = 81,993,199,112.64/412,840.80
  6. Step 6: Final answer
    x = 198,607.31

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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.