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Finding the Fourth Proportional to 409,659.20, 613,912.80 and 325,563.20

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Solution

The fourth proportional to 409,659.20, 613,912.80 and 325,563.20 is: 487,887.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,659.20 : 613,912.80 = 325,563.20 : x
  2. Step 2: Convert to fraction form
    409,659.20/613,912.80 = 325,563.20/x
  3. Step 3: Cross multiply
    409,659.20x = 613,912.80 × 325,563.20
  4. Step 4: Simplify right side
    409,659.20x = 199,867,415,688.96
  5. Step 5: Solve for x
    x = 199,867,415,688.96/409,659.20
  6. Step 6: Final answer
    x = 487,887.04

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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.