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Finding the Fourth Proportional to 288,611.91, 398,285.91 and 161,289.63

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Solution

The fourth proportional to 288,611.91, 398,285.91 and 161,289.63 is: 222,580.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,611.91 : 398,285.91 = 161,289.63 : x
  2. Step 2: Convert to fraction form
    288,611.91/398,285.91 = 161,289.63/x
  3. Step 3: Cross multiply
    288,611.91x = 398,285.91 × 161,289.63
  4. Step 4: Simplify right side
    288,611.91x = 64,239,387,058.11
  5. Step 5: Solve for x
    x = 64,239,387,058.11/288,611.91
  6. Step 6: Final answer
    x = 222,580.51

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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.