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Finding the Fourth Proportional to 659,015.78, 988,329.90 and 279,933.50

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Solution

The fourth proportional to 659,015.78, 988,329.90 and 279,933.50 is: 419,817.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,015.78 : 988,329.90 = 279,933.50 : x
  2. Step 2: Convert to fraction form
    659,015.78/988,329.90 = 279,933.50/x
  3. Step 3: Cross multiply
    659,015.78x = 988,329.90 × 279,933.50
  4. Step 4: Simplify right side
    659,015.78x = 276,666,648,061.65
  5. Step 5: Solve for x
    x = 276,666,648,061.65/659,015.78
  6. Step 6: Final answer
    x = 419,817.94

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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.