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Finding the Fourth Proportional to 308,914.13, 426,174.81 and 187,958.45

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Solution

The fourth proportional to 308,914.13, 426,174.81 and 187,958.45 is: 259,305.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,914.13 : 426,174.81 = 187,958.45 : x
  2. Step 2: Convert to fraction form
    308,914.13/426,174.81 = 187,958.45/x
  3. Step 3: Cross multiply
    308,914.13x = 426,174.81 × 187,958.45
  4. Step 4: Simplify right side
    308,914.13x = 80,103,156,716.64
  5. Step 5: Solve for x
    x = 80,103,156,716.64/308,914.13
  6. Step 6: Final answer
    x = 259,305.58

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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.