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Finding the Fourth Proportional to 256,889.08, 354,272.74 and 220,579.20

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Solution

The fourth proportional to 256,889.08, 354,272.74 and 220,579.20 is: 304,198.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,889.08 : 354,272.74 = 220,579.20 : x
  2. Step 2: Convert to fraction form
    256,889.08/354,272.74 = 220,579.20/x
  3. Step 3: Cross multiply
    256,889.08x = 354,272.74 × 220,579.20
  4. Step 4: Simplify right side
    256,889.08x = 78,145,197,571.01
  5. Step 5: Solve for x
    x = 78,145,197,571.01/256,889.08
  6. Step 6: Final answer
    x = 304,198.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.