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Finding the Fourth Proportional to 281,027.20, 421,540.80 and 279,277.60

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Solution

The fourth proportional to 281,027.20, 421,540.80 and 279,277.60 is: 418,916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,027.20 : 421,540.80 = 279,277.60 : x
  2. Step 2: Convert to fraction form
    281,027.20/421,540.80 = 279,277.60/x
  3. Step 3: Cross multiply
    281,027.20x = 421,540.80 × 279,277.60
  4. Step 4: Simplify right side
    281,027.20x = 117,726,902,926.08
  5. Step 5: Solve for x
    x = 117,726,902,926.08/281,027.20
  6. Step 6: Final answer
    x = 418,916.40

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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.