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Finding the Fourth Proportional to 679,627.39, 938,028.49 and 431,108.59

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Solution

The fourth proportional to 679,627.39, 938,028.49 and 431,108.59 is: 595,020.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,627.39 : 938,028.49 = 431,108.59 : x
  2. Step 2: Convert to fraction form
    679,627.39/938,028.49 = 431,108.59/x
  3. Step 3: Cross multiply
    679,627.39x = 938,028.49 × 431,108.59
  4. Step 4: Simplify right side
    679,627.39x = 404,392,139,703.73
  5. Step 5: Solve for x
    x = 404,392,139,703.73/679,627.39
  6. Step 6: Final answer
    x = 595,020.37

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Double scale
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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.