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Finding the Fourth Proportional to 485,677.26, 728,513.46 and 130,662.36

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Solution

The fourth proportional to 485,677.26, 728,513.46 and 130,662.36 is: 195,992.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,677.26 : 728,513.46 = 130,662.36 : x
  2. Step 2: Convert to fraction form
    485,677.26/728,513.46 = 130,662.36/x
  3. Step 3: Cross multiply
    485,677.26x = 728,513.46 × 130,662.36
  4. Step 4: Simplify right side
    485,677.26x = 95,189,287,975.37
  5. Step 5: Solve for x
    x = 95,189,287,975.37/485,677.26
  6. Step 6: Final answer
    x = 195,992.89

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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.