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Finding the Fourth Proportional to 479,112.60, 718,409.70 and 198,658.20

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Solution

The fourth proportional to 479,112.60, 718,409.70 and 198,658.20 is: 297,879.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,112.60 : 718,409.70 = 198,658.20 : x
  2. Step 2: Convert to fraction form
    479,112.60/718,409.70 = 198,658.20/x
  3. Step 3: Cross multiply
    479,112.60x = 718,409.70 × 198,658.20
  4. Step 4: Simplify right side
    479,112.60x = 142,717,977,864.54
  5. Step 5: Solve for x
    x = 142,717,977,864.54/479,112.60
  6. Step 6: Final answer
    x = 297,879.83

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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.