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Finding the Fourth Proportional to 289,331.73, 399,241.85 and 161,986.77

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Solution

The fourth proportional to 289,331.73, 399,241.85 and 161,986.77 is: 223,521.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,331.73 : 399,241.85 = 161,986.77 : x
  2. Step 2: Convert to fraction form
    289,331.73/399,241.85 = 161,986.77/x
  3. Step 3: Cross multiply
    289,331.73x = 399,241.85 × 161,986.77
  4. Step 4: Simplify right side
    289,331.73x = 64,671,896,920.39
  5. Step 5: Solve for x
    x = 64,671,896,920.39/289,331.73
  6. Step 6: Final answer
    x = 223,521.62

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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.