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Finding the Fourth Proportional to 261,175.98, 391,763.97 and 172,408.73

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Solution

The fourth proportional to 261,175.98, 391,763.97 and 172,408.73 is: 258,613.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,175.98 : 391,763.97 = 172,408.73 : x
  2. Step 2: Convert to fraction form
    261,175.98/391,763.97 = 172,408.73/x
  3. Step 3: Cross multiply
    261,175.98x = 391,763.97 × 172,408.73
  4. Step 4: Simplify right side
    261,175.98x = 67,543,528,276.60
  5. Step 5: Solve for x
    x = 67,543,528,276.60/261,175.98
  6. Step 6: Final answer
    x = 258,613.09

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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.