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Finding the Fourth Proportional to 406,991.60, 561,001.11 and 320,810.84

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Solution

The fourth proportional to 406,991.60, 561,001.11 and 320,810.84 is: 442,208.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,991.60 : 561,001.11 = 320,810.84 : x
  2. Step 2: Convert to fraction form
    406,991.60/561,001.11 = 320,810.84/x
  3. Step 3: Cross multiply
    406,991.60x = 561,001.11 × 320,810.84
  4. Step 4: Simplify right side
    406,991.60x = 179,975,237,340.03
  5. Step 5: Solve for x
    x = 179,975,237,340.03/406,991.60
  6. Step 6: Final answer
    x = 442,208.73

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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.