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Finding the Fourth Proportional to 494,081.44, 681,582 and 312,487.54

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Solution

The fourth proportional to 494,081.44, 681,582 and 312,487.54 is: 431,074.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,081.44 : 681,582 = 312,487.54 : x
  2. Step 2: Convert to fraction form
    494,081.44/681,582 = 312,487.54/x
  3. Step 3: Cross multiply
    494,081.44x = 681,582 × 312,487.54
  4. Step 4: Simplify right side
    494,081.44x = 212,985,882,488.28
  5. Step 5: Solve for x
    x = 212,985,882,488.28/494,081.44
  6. Step 6: Final answer
    x = 431,074.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.