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Finding the Fourth Proportional to 485,963.70, 728,896.33 and 131,013.60

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Solution

The fourth proportional to 485,963.70, 728,896.33 and 131,013.60 is: 196,507.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,963.70 : 728,896.33 = 131,013.60 : x
  2. Step 2: Convert to fraction form
    485,963.70/728,896.33 = 131,013.60/x
  3. Step 3: Cross multiply
    485,963.70x = 728,896.33 × 131,013.60
  4. Step 4: Simplify right side
    485,963.70x = 95,495,332,220.09
  5. Step 5: Solve for x
    x = 95,495,332,220.09/485,963.70
  6. Step 6: Final answer
    x = 196,507.13

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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.