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Finding the Fourth Proportional to 609,691.21, 841,513.82 and 405,750.72

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Solution

The fourth proportional to 609,691.21, 841,513.82 and 405,750.72 is: 560,029.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,691.21 : 841,513.82 = 405,750.72 : x
  2. Step 2: Convert to fraction form
    609,691.21/841,513.82 = 405,750.72/x
  3. Step 3: Cross multiply
    609,691.21x = 841,513.82 × 405,750.72
  4. Step 4: Simplify right side
    609,691.21x = 341,444,836,326.20
  5. Step 5: Solve for x
    x = 341,444,836,326.20/609,691.21
  6. Step 6: Final answer
    x = 560,029.13

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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.