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Finding the Fourth Proportional to 289,605.88, 399,649.62 and 168,739.60

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Solution

The fourth proportional to 289,605.88, 399,649.62 and 168,739.60 is: 232,856.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,605.88 : 399,649.62 = 168,739.60 : x
  2. Step 2: Convert to fraction form
    289,605.88/399,649.62 = 168,739.60/x
  3. Step 3: Cross multiply
    289,605.88x = 399,649.62 × 168,739.60
  4. Step 4: Simplify right side
    289,605.88x = 67,436,717,018.95
  5. Step 5: Solve for x
    x = 67,436,717,018.95/289,605.88
  6. Step 6: Final answer
    x = 232,856.86

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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.