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Finding the Fourth Proportional to 339,474.06, 509,211.76 and 126,288.72

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Solution

The fourth proportional to 339,474.06, 509,211.76 and 126,288.72 is: 189,433.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,474.06 : 509,211.76 = 126,288.72 : x
  2. Step 2: Convert to fraction form
    339,474.06/509,211.76 = 126,288.72/x
  3. Step 3: Cross multiply
    339,474.06x = 509,211.76 × 126,288.72
  4. Step 4: Simplify right side
    339,474.06x = 64,307,701,379.35
  5. Step 5: Solve for x
    x = 64,307,701,379.35/339,474.06
  6. Step 6: Final answer
    x = 189,433.33

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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.