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Finding the Fourth Proportional to 539,498.90, 808,618.17 and 405,949.88

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Solution

The fourth proportional to 539,498.90, 808,618.17 and 405,949.88 is: 608,450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,498.90 : 808,618.17 = 405,949.88 : x
  2. Step 2: Convert to fraction form
    539,498.90/808,618.17 = 405,949.88/x
  3. Step 3: Cross multiply
    539,498.90x = 808,618.17 × 405,949.88
  4. Step 4: Simplify right side
    539,498.90x = 328,258,449,077.32
  5. Step 5: Solve for x
    x = 328,258,449,077.32/539,498.90
  6. Step 6: Final answer
    x = 608,450.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.