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Finding the Fourth Proportional to 443,016.72, 611,150.22 and 289,987.56

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Solution

The fourth proportional to 443,016.72, 611,150.22 and 289,987.56 is: 400,043.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,016.72 : 611,150.22 = 289,987.56 : x
  2. Step 2: Convert to fraction form
    443,016.72/611,150.22 = 289,987.56/x
  3. Step 3: Cross multiply
    443,016.72x = 611,150.22 × 289,987.56
  4. Step 4: Simplify right side
    443,016.72x = 177,225,961,091.26
  5. Step 5: Solve for x
    x = 177,225,961,091.26/443,016.72
  6. Step 6: Final answer
    x = 400,043.50

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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.