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Finding the Fourth Proportional to 339,951.20, 509,999.70 and 103,317.80

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Solution

The fourth proportional to 339,951.20, 509,999.70 and 103,317.80 is: 154,998.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,951.20 : 509,999.70 = 103,317.80 : x
  2. Step 2: Convert to fraction form
    339,951.20/509,999.70 = 103,317.80/x
  3. Step 3: Cross multiply
    339,951.20x = 509,999.70 × 103,317.80
  4. Step 4: Simplify right side
    339,951.20x = 52,692,047,004.66
  5. Step 5: Solve for x
    x = 52,692,047,004.66/339,951.20
  6. Step 6: Final answer
    x = 154,998.86

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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.