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Finding the Fourth Proportional to 659,015.66, 988,329.71 and 279,933.38

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Solution

The fourth proportional to 659,015.66, 988,329.71 and 279,933.38 is: 419,817.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,015.66 : 988,329.71 = 279,933.38 : x
  2. Step 2: Convert to fraction form
    659,015.66/988,329.71 = 279,933.38/x
  3. Step 3: Cross multiply
    659,015.66x = 988,329.71 × 279,933.38
  4. Step 4: Simplify right side
    659,015.66x = 276,666,469,933.40
  5. Step 5: Solve for x
    x = 276,666,469,933.40/659,015.66
  6. Step 6: Final answer
    x = 419,817.75

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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.