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Finding the Fourth Proportional to 485,836.86, 728,672.67 and 130,771.74

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Solution

The fourth proportional to 485,836.86, 728,672.67 and 130,771.74 is: 196,135.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,836.86 : 728,672.67 = 130,771.74 : x
  2. Step 2: Convert to fraction form
    485,836.86/728,672.67 = 130,771.74/x
  3. Step 3: Cross multiply
    485,836.86x = 728,672.67 × 130,771.74
  4. Step 4: Simplify right side
    485,836.86x = 95,289,792,946.35
  5. Step 5: Solve for x
    x = 95,289,792,946.35/485,836.86
  6. Step 6: Final answer
    x = 196,135.37

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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.