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Finding the Fourth Proportional to 426,857.81, 640,311.77 and 160,620.62

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Solution

The fourth proportional to 426,857.81, 640,311.77 and 160,620.62 is: 240,940.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,857.81 : 640,311.77 = 160,620.62 : x
  2. Step 2: Convert to fraction form
    426,857.81/640,311.77 = 160,620.62/x
  3. Step 3: Cross multiply
    426,857.81x = 640,311.77 × 160,620.62
  4. Step 4: Simplify right side
    426,857.81x = 102,847,274,288.37
  5. Step 5: Solve for x
    x = 102,847,274,288.37/426,857.81
  6. Step 6: Final answer
    x = 240,940.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.