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Finding the Fourth Proportional to 783,889.82, 1,081,779.71 and 439,801.82

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Solution

The fourth proportional to 783,889.82, 1,081,779.71 and 439,801.82 is: 606,933.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,889.82 : 1,081,779.71 = 439,801.82 : x
  2. Step 2: Convert to fraction form
    783,889.82/1,081,779.71 = 439,801.82/x
  3. Step 3: Cross multiply
    783,889.82x = 1,081,779.71 × 439,801.82
  4. Step 4: Simplify right side
    783,889.82x = 475,768,681,745.84
  5. Step 5: Solve for x
    x = 475,768,681,745.84/783,889.82
  6. Step 6: Final answer
    x = 606,933.11

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.