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Finding the Fourth Proportional to 418,990.89, 628,492.20 and 119,471.60

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Solution

The fourth proportional to 418,990.89, 628,492.20 and 119,471.60 is: 179,209.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,990.89 : 628,492.20 = 119,471.60 : x
  2. Step 2: Convert to fraction form
    418,990.89/628,492.20 = 119,471.60/x
  3. Step 3: Cross multiply
    418,990.89x = 628,492.20 × 119,471.60
  4. Step 4: Simplify right side
    418,990.89x = 75,086,965,579.06
  5. Step 5: Solve for x
    x = 75,086,965,579.06/418,990.89
  6. Step 6: Final answer
    x = 179,209.06

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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.