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Finding the Fourth Proportional to 518,066.58, 777,629.97 and 427,821.87

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Solution

The fourth proportional to 518,066.58, 777,629.97 and 427,821.87 is: 642,170.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,066.58 : 777,629.97 = 427,821.87 : x
  2. Step 2: Convert to fraction form
    518,066.58/777,629.97 = 427,821.87/x
  3. Step 3: Cross multiply
    518,066.58x = 777,629.97 × 427,821.87
  4. Step 4: Simplify right side
    518,066.58x = 332,687,107,933.44
  5. Step 5: Solve for x
    x = 332,687,107,933.44/518,066.58
  6. Step 6: Final answer
    x = 642,170.56

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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.