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Finding the Fourth Proportional to 339,727.67, 509,652.80 and 139,939.01

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Solution

The fourth proportional to 339,727.67, 509,652.80 and 139,939.01 is: 209,933.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,727.67 : 509,652.80 = 139,939.01 : x
  2. Step 2: Convert to fraction form
    339,727.67/509,652.80 = 139,939.01/x
  3. Step 3: Cross multiply
    339,727.67x = 509,652.80 × 139,939.01
  4. Step 4: Simplify right side
    339,727.67x = 71,320,307,576.03
  5. Step 5: Solve for x
    x = 71,320,307,576.03/339,727.67
  6. Step 6: Final answer
    x = 209,933.76

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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.