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Finding the Fourth Proportional to 256,936.20, 385,404.30 and 252,999.60

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Solution

The fourth proportional to 256,936.20, 385,404.30 and 252,999.60 is: 379,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,936.20 : 385,404.30 = 252,999.60 : x
  2. Step 2: Convert to fraction form
    256,936.20/385,404.30 = 252,999.60/x
  3. Step 3: Cross multiply
    256,936.20x = 385,404.30 × 252,999.60
  4. Step 4: Simplify right side
    256,936.20x = 97,507,133,738.28
  5. Step 5: Solve for x
    x = 97,507,133,738.28/256,936.20
  6. Step 6: Final answer
    x = 379,499.40

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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.