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Finding the Fourth Proportional to 393,480.96, 542,936.03 and 221,375.00

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Solution

The fourth proportional to 393,480.96, 542,936.03 and 221,375.00 is: 305,459.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,480.96 : 542,936.03 = 221,375.00 : x
  2. Step 2: Convert to fraction form
    393,480.96/542,936.03 = 221,375.00/x
  3. Step 3: Cross multiply
    393,480.96x = 542,936.03 × 221,375.00
  4. Step 4: Simplify right side
    393,480.96x = 120,192,459,819.70
  5. Step 5: Solve for x
    x = 120,192,459,819.70/393,480.96
  6. Step 6: Final answer
    x = 305,459.40

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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.