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Finding the Fourth Proportional to 443,019.72, 611,154.36 and 289,990.56

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Solution

The fourth proportional to 443,019.72, 611,154.36 and 289,990.56 is: 400,047.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,019.72 : 611,154.36 = 289,990.56 : x
  2. Step 2: Convert to fraction form
    443,019.72/611,154.36 = 289,990.56/x
  3. Step 3: Cross multiply
    443,019.72x = 611,154.36 × 289,990.56
  4. Step 4: Simplify right side
    443,019.72x = 177,228,995,102.84
  5. Step 5: Solve for x
    x = 177,228,995,102.84/443,019.72
  6. Step 6: Final answer
    x = 400,047.64

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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.