Home / 430,481.82-645,739.02-219,873.72

Finding the Fourth Proportional to 430,481.82, 645,739.02 and 219,873.72

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Solution

The fourth proportional to 430,481.82, 645,739.02 and 219,873.72 is: 329,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,481.82 : 645,739.02 = 219,873.72 : x
  2. Step 2: Convert to fraction form
    430,481.82/645,739.02 = 219,873.72/x
  3. Step 3: Cross multiply
    430,481.82x = 645,739.02 × 219,873.72
  4. Step 4: Simplify right side
    430,481.82x = 141,981,040,476.55
  5. Step 5: Solve for x
    x = 141,981,040,476.55/430,481.82
  6. Step 6: Final answer
    x = 329,818.90

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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.