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Finding the Fourth Proportional to 519,690.89, 717,668.75 and 491,387.33

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Solution

The fourth proportional to 519,690.89, 717,668.75 and 491,387.33 is: 678,582.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,690.89 : 717,668.75 = 491,387.33 : x
  2. Step 2: Convert to fraction form
    519,690.89/717,668.75 = 491,387.33/x
  3. Step 3: Cross multiply
    519,690.89x = 717,668.75 × 491,387.33
  4. Step 4: Simplify right side
    519,690.89x = 352,653,333,909.58
  5. Step 5: Solve for x
    x = 352,653,333,909.58/519,690.89
  6. Step 6: Final answer
    x = 678,582.86

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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.