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Finding the Fourth Proportional to 308,930.80, 426,360.42 and 188,142.88

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Solution

The fourth proportional to 308,930.80, 426,360.42 and 188,142.88 is: 259,659.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,930.80 : 426,360.42 = 188,142.88 : x
  2. Step 2: Convert to fraction form
    308,930.80/426,360.42 = 188,142.88/x
  3. Step 3: Cross multiply
    308,930.80x = 426,360.42 × 188,142.88
  4. Step 4: Simplify right side
    308,930.80x = 80,216,677,336.81
  5. Step 5: Solve for x
    x = 80,216,677,336.81/308,930.80
  6. Step 6: Final answer
    x = 259,659.05

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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.