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Finding the Fourth Proportional to 485,800.38, 728,707.68 and 219,375.18

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Solution

The fourth proportional to 485,800.38, 728,707.68 and 219,375.18 is: 329,065.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,800.38 : 728,707.68 = 219,375.18 : x
  2. Step 2: Convert to fraction form
    485,800.38/728,707.68 = 219,375.18/x
  3. Step 3: Cross multiply
    485,800.38x = 728,707.68 × 219,375.18
  4. Step 4: Simplify right side
    485,800.38x = 159,860,378,467.38
  5. Step 5: Solve for x
    x = 159,860,378,467.38/485,800.38
  6. Step 6: Final answer
    x = 329,065.98

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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.