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Finding the Fourth Proportional to 485,962.67, 728,894.79 and 131,012.57

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Solution

The fourth proportional to 485,962.67, 728,894.79 and 131,012.57 is: 196,505.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,962.67 : 728,894.79 = 131,012.57 : x
  2. Step 2: Convert to fraction form
    485,962.67/728,894.79 = 131,012.57/x
  3. Step 3: Cross multiply
    485,962.67x = 728,894.79 × 131,012.57
  4. Step 4: Simplify right side
    485,962.67x = 95,494,378,295.09
  5. Step 5: Solve for x
    x = 95,494,378,295.09/485,962.67
  6. Step 6: Final answer
    x = 196,505.58

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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.