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Finding the Fourth Proportional to 256,960.38, 385,489.80 and 79,436.13

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Solution

The fourth proportional to 256,960.38, 385,489.80 and 79,436.13 is: 119,169.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,960.38 : 385,489.80 = 79,436.13 : x
  2. Step 2: Convert to fraction form
    256,960.38/385,489.80 = 79,436.13/x
  3. Step 3: Cross multiply
    256,960.38x = 385,489.80 × 79,436.13
  4. Step 4: Simplify right side
    256,960.38x = 30,621,816,420.89
  5. Step 5: Solve for x
    x = 30,621,816,420.89/256,960.38
  6. Step 6: Final answer
    x = 119,169.41

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1.5x scale

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.