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Finding the Fourth Proportional to 659,012.66, 988,325.21 and 279,930.38

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Solution

The fourth proportional to 659,012.66, 988,325.21 and 279,930.38 is: 419,813.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,012.66 : 988,325.21 = 279,930.38 : x
  2. Step 2: Convert to fraction form
    659,012.66/988,325.21 = 279,930.38/x
  3. Step 3: Cross multiply
    659,012.66x = 988,325.21 × 279,930.38
  4. Step 4: Simplify right side
    659,012.66x = 276,662,247,357.08
  5. Step 5: Solve for x
    x = 276,662,247,357.08/659,012.66
  6. Step 6: Final answer
    x = 419,813.25

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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.