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Finding the Fourth Proportional to 667,745.88, 921,247.51 and 406,011.19

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Solution

The fourth proportional to 667,745.88, 921,247.51 and 406,011.19 is: 560,148.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,745.88 : 921,247.51 = 406,011.19 : x
  2. Step 2: Convert to fraction form
    667,745.88/921,247.51 = 406,011.19/x
  3. Step 3: Cross multiply
    667,745.88x = 921,247.51 × 406,011.19
  4. Step 4: Simplify right side
    667,745.88x = 374,036,797,819.64
  5. Step 5: Solve for x
    x = 374,036,797,819.64/667,745.88
  6. Step 6: Final answer
    x = 560,148.42

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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.