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Finding the Fourth Proportional to 617,198.70, 851,704.56 and 387,874.74

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Solution

The fourth proportional to 617,198.70, 851,704.56 and 387,874.74 is: 535,248.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,198.70 : 851,704.56 = 387,874.74 : x
  2. Step 2: Convert to fraction form
    617,198.70/851,704.56 = 387,874.74/x
  3. Step 3: Cross multiply
    617,198.70x = 851,704.56 × 387,874.74
  4. Step 4: Simplify right side
    617,198.70x = 330,354,684,766.81
  5. Step 5: Solve for x
    x = 330,354,684,766.81/617,198.70
  6. Step 6: Final answer
    x = 535,248.51

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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.