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Finding the Fourth Proportional to 256,939.20, 385,408.80 and 246,571.20

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Solution

The fourth proportional to 256,939.20, 385,408.80 and 246,571.20 is: 369,856.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,939.20 : 385,408.80 = 246,571.20 : x
  2. Step 2: Convert to fraction form
    256,939.20/385,408.80 = 246,571.20/x
  3. Step 3: Cross multiply
    256,939.20x = 385,408.80 × 246,571.20
  4. Step 4: Simplify right side
    256,939.20x = 95,030,710,306.56
  5. Step 5: Solve for x
    x = 95,030,710,306.56/256,939.20
  6. Step 6: Final answer
    x = 369,856.80

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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.