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Finding the Fourth Proportional to 339,655.99, 509,287.19 and 139,750.56

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Solution

The fourth proportional to 339,655.99, 509,287.19 and 139,750.56 is: 209,544.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,655.99 : 509,287.19 = 139,750.56 : x
  2. Step 2: Convert to fraction form
    339,655.99/509,287.19 = 139,750.56/x
  3. Step 3: Cross multiply
    339,655.99x = 509,287.19 × 139,750.56
  4. Step 4: Simplify right side
    339,655.99x = 71,173,170,003.33
  5. Step 5: Solve for x
    x = 71,173,170,003.33/339,655.99
  6. Step 6: Final answer
    x = 209,544.87

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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.