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Finding the Fourth Proportional to 261,176.98, 391,765.47 and 172,409.73

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Solution

The fourth proportional to 261,176.98, 391,765.47 and 172,409.73 is: 258,614.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,176.98 : 391,765.47 = 172,409.73 : x
  2. Step 2: Convert to fraction form
    261,176.98/391,765.47 = 172,409.73/x
  3. Step 3: Cross multiply
    261,176.98x = 391,765.47 × 172,409.73
  4. Step 4: Simplify right side
    261,176.98x = 67,544,178,906.02
  5. Step 5: Solve for x
    x = 67,544,178,906.02/261,176.98
  6. Step 6: Final answer
    x = 258,614.60

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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.