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Finding the Fourth Proportional to 485,758.36, 728,571.72 and 130,793.68

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Solution

The fourth proportional to 485,758.36, 728,571.72 and 130,793.68 is: 196,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,758.36 : 728,571.72 = 130,793.68 : x
  2. Step 2: Convert to fraction form
    485,758.36/728,571.72 = 130,793.68/x
  3. Step 3: Cross multiply
    485,758.36x = 728,571.72 × 130,793.68
  4. Step 4: Simplify right side
    485,758.36x = 95,292,576,402.73
  5. Step 5: Solve for x
    x = 95,292,576,402.73/485,758.36
  6. Step 6: Final answer
    x = 196,172.80

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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.