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Finding the Fourth Proportional to 394,613.40, 591,920.10 and 172,997.40

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Solution

The fourth proportional to 394,613.40, 591,920.10 and 172,997.40 is: 259,496.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,613.40 : 591,920.10 = 172,997.40 : x
  2. Step 2: Convert to fraction form
    394,613.40/591,920.10 = 172,997.40/x
  3. Step 3: Cross multiply
    394,613.40x = 591,920.10 × 172,997.40
  4. Step 4: Simplify right side
    394,613.40x = 102,400,638,307.74
  5. Step 5: Solve for x
    x = 102,400,638,307.74/394,613.40
  6. Step 6: Final answer
    x = 259,496.10

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Similar ratio
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1.5x scale

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.