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Finding the Fourth Proportional to 612,655.75, 844,578.61 and 405,577.15

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Solution

The fourth proportional to 612,655.75, 844,578.61 and 405,577.15 is: 559,109.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,655.75 : 844,578.61 = 405,577.15 : x
  2. Step 2: Convert to fraction form
    612,655.75/844,578.61 = 405,577.15/x
  3. Step 3: Cross multiply
    612,655.75x = 844,578.61 × 405,577.15
  4. Step 4: Simplify right side
    612,655.75x = 342,541,785,594.76
  5. Step 5: Solve for x
    x = 342,541,785,594.76/612,655.75
  6. Step 6: Final answer
    x = 559,109.72

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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.