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Finding the Fourth Proportional to 278,912.49, 418,284.90 and 79,249.11

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Solution

The fourth proportional to 278,912.49, 418,284.90 and 79,249.11 is: 118,849.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,912.49 : 418,284.90 = 79,249.11 : x
  2. Step 2: Convert to fraction form
    278,912.49/418,284.90 = 79,249.11/x
  3. Step 3: Cross multiply
    278,912.49x = 418,284.90 × 79,249.11
  4. Step 4: Simplify right side
    278,912.49x = 33,148,706,051.44
  5. Step 5: Solve for x
    x = 33,148,706,051.44/278,912.49
  6. Step 6: Final answer
    x = 118,849.84

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1.5x scale

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.