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Finding the Fourth Proportional to 278,316.44, 418,049.64 and 266,187.69

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Solution

The fourth proportional to 278,316.44, 418,049.64 and 266,187.69 is: 399,831.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,316.44 : 418,049.64 = 266,187.69 : x
  2. Step 2: Convert to fraction form
    278,316.44/418,049.64 = 266,187.69/x
  3. Step 3: Cross multiply
    278,316.44x = 418,049.64 × 266,187.69
  4. Step 4: Simplify right side
    278,316.44x = 111,279,667,976.93
  5. Step 5: Solve for x
    x = 111,279,667,976.93/278,316.44
  6. Step 6: Final answer
    x = 399,831.47

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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.