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Finding the Fourth Proportional to 659,012.28, 988,324.65 and 279,930

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Solution

The fourth proportional to 659,012.28, 988,324.65 and 279,930 is: 419,812.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,012.28 : 988,324.65 = 279,930 : x
  2. Step 2: Convert to fraction form
    659,012.28/988,324.65 = 279,930/x
  3. Step 3: Cross multiply
    659,012.28x = 988,324.65 × 279,930
  4. Step 4: Simplify right side
    659,012.28x = 276,661,719,274.50
  5. Step 5: Solve for x
    x = 276,661,719,274.50/659,012.28
  6. Step 6: Final answer
    x = 419,812.69

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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.