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Finding the Fourth Proportional to 256,940.20, 385,410.30 and 253,003.60

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Solution

The fourth proportional to 256,940.20, 385,410.30 and 253,003.60 is: 379,505.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,940.20 : 385,410.30 = 253,003.60 : x
  2. Step 2: Convert to fraction form
    256,940.20/385,410.30 = 253,003.60/x
  3. Step 3: Cross multiply
    256,940.20x = 385,410.30 × 253,003.60
  4. Step 4: Simplify right side
    256,940.20x = 97,510,193,377.08
  5. Step 5: Solve for x
    x = 97,510,193,377.08/256,940.20
  6. Step 6: Final answer
    x = 379,505.40

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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.