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Finding the Fourth Proportional to 327,090.40, 490,635.60 and 256,231.60

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Solution

The fourth proportional to 327,090.40, 490,635.60 and 256,231.60 is: 384,347.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,090.40 : 490,635.60 = 256,231.60 : x
  2. Step 2: Convert to fraction form
    327,090.40/490,635.60 = 256,231.60/x
  3. Step 3: Cross multiply
    327,090.40x = 490,635.60 × 256,231.60
  4. Step 4: Simplify right side
    327,090.40x = 125,716,344,804.96
  5. Step 5: Solve for x
    x = 125,716,344,804.96/327,090.40
  6. Step 6: Final answer
    x = 384,347.40

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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.