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Finding the Fourth Proportional to 485,390.80, 728,108.04 and 185,793.66

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Solution

The fourth proportional to 485,390.80, 728,108.04 and 185,793.66 is: 278,698.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,390.80 : 728,108.04 = 185,793.66 : x
  2. Step 2: Convert to fraction form
    485,390.80/728,108.04 = 185,793.66/x
  3. Step 3: Cross multiply
    485,390.80x = 728,108.04 × 185,793.66
  4. Step 4: Simplify right side
    485,390.80x = 135,277,857,627.03
  5. Step 5: Solve for x
    x = 135,277,857,627.03/485,390.80
  6. Step 6: Final answer
    x = 278,698.85

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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.