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Finding the Fourth Proportional to 256,940.30, 385,410.45 and 225,836.30

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Solution

The fourth proportional to 256,940.30, 385,410.45 and 225,836.30 is: 338,754.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,940.30 : 385,410.45 = 225,836.30 : x
  2. Step 2: Convert to fraction form
    256,940.30/385,410.45 = 225,836.30/x
  3. Step 3: Cross multiply
    256,940.30x = 385,410.45 × 225,836.30
  4. Step 4: Simplify right side
    256,940.30x = 87,039,670,009.34
  5. Step 5: Solve for x
    x = 87,039,670,009.34/256,940.30
  6. Step 6: Final answer
    x = 338,754.45

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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.