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Finding the Fourth Proportional to 419,801.10, 629,701.65 and 170,661.90

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Solution

The fourth proportional to 419,801.10, 629,701.65 and 170,661.90 is: 255,992.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,801.10 : 629,701.65 = 170,661.90 : x
  2. Step 2: Convert to fraction form
    419,801.10/629,701.65 = 170,661.90/x
  3. Step 3: Cross multiply
    419,801.10x = 629,701.65 × 170,661.90
  4. Step 4: Simplify right side
    419,801.10x = 107,466,080,022.14
  5. Step 5: Solve for x
    x = 107,466,080,022.14/419,801.10
  6. Step 6: Final answer
    x = 255,992.85

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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.