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Finding the Fourth Proportional to 278,800.56, 418,203 and 68,440.32

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Solution

The fourth proportional to 278,800.56, 418,203 and 68,440.32 is: 102,661.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,800.56 : 418,203 = 68,440.32 : x
  2. Step 2: Convert to fraction form
    278,800.56/418,203 = 68,440.32/x
  3. Step 3: Cross multiply
    278,800.56x = 418,203 × 68,440.32
  4. Step 4: Simplify right side
    278,800.56x = 28,621,947,144.96
  5. Step 5: Solve for x
    x = 28,621,947,144.96/278,800.56
  6. Step 6: Final answer
    x = 102,661.01

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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.