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Finding the Fourth Proportional to 418,700.88, 628,129.20 and 193,912.80

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Solution

The fourth proportional to 418,700.88, 628,129.20 and 193,912.80 is: 290,905.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,700.88 : 628,129.20 = 193,912.80 : x
  2. Step 2: Convert to fraction form
    418,700.88/628,129.20 = 193,912.80/x
  3. Step 3: Cross multiply
    418,700.88x = 628,129.20 × 193,912.80
  4. Step 4: Simplify right side
    418,700.88x = 121,802,291,933.76
  5. Step 5: Solve for x
    x = 121,802,291,933.76/418,700.88
  6. Step 6: Final answer
    x = 290,905.27

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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.