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Finding the Fourth Proportional to 256,939.20, 385,408.80 and 182,143.80

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Solution

The fourth proportional to 256,939.20, 385,408.80 and 182,143.80 is: 273,215.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,939.20 : 385,408.80 = 182,143.80 : x
  2. Step 2: Convert to fraction form
    256,939.20/385,408.80 = 182,143.80/x
  3. Step 3: Cross multiply
    256,939.20x = 385,408.80 × 182,143.80
  4. Step 4: Simplify right side
    256,939.20x = 70,199,823,385.44
  5. Step 5: Solve for x
    x = 70,199,823,385.44/256,939.20
  6. Step 6: Final answer
    x = 273,215.70

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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.