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Finding the Fourth Proportional to 256,958.73, 385,448.90 and 79,469.10

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Solution

The fourth proportional to 256,958.73, 385,448.90 and 79,469.10 is: 119,206.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,958.73 : 385,448.90 = 79,469.10 : x
  2. Step 2: Convert to fraction form
    256,958.73/385,448.90 = 79,469.10/x
  3. Step 3: Cross multiply
    256,958.73x = 385,448.90 × 79,469.10
  4. Step 4: Simplify right side
    256,958.73x = 30,631,276,781.64
  5. Step 5: Solve for x
    x = 30,631,276,781.64/256,958.73
  6. Step 6: Final answer
    x = 119,206.99

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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.