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Finding the Fourth Proportional to 339,690, 469,251.84 and 272,155.44

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Solution

The fourth proportional to 339,690, 469,251.84 and 272,155.44 is: 375,958.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,690 : 469,251.84 = 272,155.44 : x
  2. Step 2: Convert to fraction form
    339,690/469,251.84 = 272,155.44/x
  3. Step 3: Cross multiply
    339,690x = 469,251.84 × 272,155.44
  4. Step 4: Simplify right side
    339,690x = 127,709,440,986.01
  5. Step 5: Solve for x
    x = 127,709,440,986.01/339,690
  6. Step 6: Final answer
    x = 375,958.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.