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Finding the Fourth Proportional to 339,963.80, 509,945.70 and 140,217.80

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Solution

The fourth proportional to 339,963.80, 509,945.70 and 140,217.80 is: 210,326.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,963.80 : 509,945.70 = 140,217.80 : x
  2. Step 2: Convert to fraction form
    339,963.80/509,945.70 = 140,217.80/x
  3. Step 3: Cross multiply
    339,963.80x = 509,945.70 × 140,217.80
  4. Step 4: Simplify right side
    339,963.80x = 71,503,464,173.46
  5. Step 5: Solve for x
    x = 71,503,464,173.46/339,963.80
  6. Step 6: Final answer
    x = 210,326.70

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1.5x scale

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.