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Finding the Fourth Proportional to 278,793.39, 384,711 and 154,618.38

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Solution

The fourth proportional to 278,793.39, 384,711 and 154,618.38 is: 213,360.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,793.39 : 384,711 = 154,618.38 : x
  2. Step 2: Convert to fraction form
    278,793.39/384,711 = 154,618.38/x
  3. Step 3: Cross multiply
    278,793.39x = 384,711 × 154,618.38
  4. Step 4: Simplify right side
    278,793.39x = 59,483,391,588.18
  5. Step 5: Solve for x
    x = 59,483,391,588.18/278,793.39
  6. Step 6: Final answer
    x = 213,360.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.