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Finding the Fourth Proportional to 479,290.78, 718,812.87 and 142,251.58

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Solution

The fourth proportional to 479,290.78, 718,812.87 and 142,251.58 is: 213,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,290.78 : 718,812.87 = 142,251.58 : x
  2. Step 2: Convert to fraction form
    479,290.78/718,812.87 = 142,251.58/x
  3. Step 3: Cross multiply
    479,290.78x = 718,812.87 × 142,251.58
  4. Step 4: Simplify right side
    479,290.78x = 102,252,266,481.84
  5. Step 5: Solve for x
    x = 102,252,266,481.84/479,290.78
  6. Step 6: Final answer
    x = 213,340.78

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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.