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Finding the Fourth Proportional to 479,072.97, 718,486.74 and 142,034.85

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Solution

The fourth proportional to 479,072.97, 718,486.74 and 142,034.85 is: 213,015.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,072.97 : 718,486.74 = 142,034.85 : x
  2. Step 2: Convert to fraction form
    479,072.97/718,486.74 = 142,034.85/x
  3. Step 3: Cross multiply
    479,072.97x = 718,486.74 × 142,034.85
  4. Step 4: Simplify right side
    479,072.97x = 102,050,156,342.89
  5. Step 5: Solve for x
    x = 102,050,156,342.89/479,072.97
  6. Step 6: Final answer
    x = 213,015.89

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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.