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Finding the Fourth Proportional to 339,505.28, 511,289.03 and 309,238.57

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Solution

The fourth proportional to 339,505.28, 511,289.03 and 309,238.57 is: 465,707.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,505.28 : 511,289.03 = 309,238.57 : x
  2. Step 2: Convert to fraction form
    339,505.28/511,289.03 = 309,238.57/x
  3. Step 3: Cross multiply
    339,505.28x = 511,289.03 × 309,238.57
  4. Step 4: Simplify right side
    339,505.28x = 158,110,288,493.89
  5. Step 5: Solve for x
    x = 158,110,288,493.89/339,505.28
  6. Step 6: Final answer
    x = 465,707.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.