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Finding the Fourth Proportional to 485,800.20, 728,481.60 and 219,423.60

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Solution

The fourth proportional to 485,800.20, 728,481.60 and 219,423.60 is: 329,036.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,800.20 : 728,481.60 = 219,423.60 : x
  2. Step 2: Convert to fraction form
    485,800.20/728,481.60 = 219,423.60/x
  3. Step 3: Cross multiply
    485,800.20x = 728,481.60 × 219,423.60
  4. Step 4: Simplify right side
    485,800.20x = 159,846,055,205.76
  5. Step 5: Solve for x
    x = 159,846,055,205.76/485,800.20
  6. Step 6: Final answer
    x = 329,036.62

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1.5x scale

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.