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Finding the Fourth Proportional to 667,238.77, 921,014.04 and 405,593.11

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Solution

The fourth proportional to 667,238.77, 921,014.04 and 405,593.11 is: 559,854.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,238.77 : 921,014.04 = 405,593.11 : x
  2. Step 2: Convert to fraction form
    667,238.77/921,014.04 = 405,593.11/x
  3. Step 3: Cross multiply
    667,238.77x = 921,014.04 × 405,593.11
  4. Step 4: Simplify right side
    667,238.77x = 373,556,948,837.26
  5. Step 5: Solve for x
    x = 373,556,948,837.26/667,238.77
  6. Step 6: Final answer
    x = 559,854.98

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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.