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Finding the Fourth Proportional to 278,800.44, 418,208.86 and 68,438.38

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Solution

The fourth proportional to 278,800.44, 418,208.86 and 68,438.38 is: 102,659.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,800.44 : 418,208.86 = 68,438.38 : x
  2. Step 2: Convert to fraction form
    278,800.44/418,208.86 = 68,438.38/x
  3. Step 3: Cross multiply
    278,800.44x = 418,208.86 × 68,438.38
  4. Step 4: Simplify right side
    278,800.44x = 28,621,536,880.05
  5. Step 5: Solve for x
    x = 28,621,536,880.05/278,800.44
  6. Step 6: Final answer
    x = 102,659.58

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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.