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Finding the Fourth Proportional to 289,157.89, 398,990.27 and 181,651.78

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Solution

The fourth proportional to 289,157.89, 398,990.27 and 181,651.78 is: 250,649.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,157.89 : 398,990.27 = 181,651.78 : x
  2. Step 2: Convert to fraction form
    289,157.89/398,990.27 = 181,651.78/x
  3. Step 3: Cross multiply
    289,157.89x = 398,990.27 × 181,651.78
  4. Step 4: Simplify right side
    289,157.89x = 72,477,294,199.79
  5. Step 5: Solve for x
    x = 72,477,294,199.79/289,157.89
  6. Step 6: Final answer
    x = 250,649.55

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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.