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Finding the Fourth Proportional to 612,951.96, 845,394.42 and 398,161.22

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Solution

The fourth proportional to 612,951.96, 845,394.42 and 398,161.22 is: 549,151.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,951.96 : 845,394.42 = 398,161.22 : x
  2. Step 2: Convert to fraction form
    612,951.96/845,394.42 = 398,161.22/x
  3. Step 3: Cross multiply
    612,951.96x = 845,394.42 × 398,161.22
  4. Step 4: Simplify right side
    612,951.96x = 336,603,275,761.88
  5. Step 5: Solve for x
    x = 336,603,275,761.88/612,951.96
  6. Step 6: Final answer
    x = 549,151.15

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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.