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Finding the Fourth Proportional to 685,637.80, 945,866.15 and 443,998.22

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Solution

The fourth proportional to 685,637.80, 945,866.15 and 443,998.22 is: 612,514.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,637.80 : 945,866.15 = 443,998.22 : x
  2. Step 2: Convert to fraction form
    685,637.80/945,866.15 = 443,998.22/x
  3. Step 3: Cross multiply
    685,637.80x = 945,866.15 × 443,998.22
  4. Step 4: Simplify right side
    685,637.80x = 419,962,887,700.17
  5. Step 5: Solve for x
    x = 419,962,887,700.17/685,637.80
  6. Step 6: Final answer
    x = 612,514.20

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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.