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Finding the Fourth Proportional to 620,603.83, 930,905.79 and 199,879.71

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Solution

The fourth proportional to 620,603.83, 930,905.79 and 199,879.71 is: 299,819.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,603.83 : 930,905.79 = 199,879.71 : x
  2. Step 2: Convert to fraction form
    620,603.83/930,905.79 = 199,879.71/x
  3. Step 3: Cross multiply
    620,603.83x = 930,905.79 × 199,879.71
  4. Step 4: Simplify right side
    620,603.83x = 186,069,179,342.52
  5. Step 5: Solve for x
    x = 186,069,179,342.52/620,603.83
  6. Step 6: Final answer
    x = 299,819.58

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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.