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Finding the Fourth Proportional to 641,104.30, 961,656.45 and 611,579.80

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Solution

The fourth proportional to 641,104.30, 961,656.45 and 611,579.80 is: 917,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,104.30 : 961,656.45 = 611,579.80 : x
  2. Step 2: Convert to fraction form
    641,104.30/961,656.45 = 611,579.80/x
  3. Step 3: Cross multiply
    641,104.30x = 961,656.45 × 611,579.80
  4. Step 4: Simplify right side
    641,104.30x = 588,129,659,359.71
  5. Step 5: Solve for x
    x = 588,129,659,359.71/641,104.30
  6. Step 6: Final answer
    x = 917,369.70

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1.5x scale

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.