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Finding the Fourth Proportional to 425,198.21, 637,589.78 and 185,514.71

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Solution

The fourth proportional to 425,198.21, 637,589.78 and 185,514.71 is: 278,181.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,198.21 : 637,589.78 = 185,514.71 : x
  2. Step 2: Convert to fraction form
    425,198.21/637,589.78 = 185,514.71/x
  3. Step 3: Cross multiply
    425,198.21x = 637,589.78 × 185,514.71
  4. Step 4: Simplify right side
    425,198.21x = 118,282,279,715.82
  5. Step 5: Solve for x
    x = 118,282,279,715.82/425,198.21
  6. Step 6: Final answer
    x = 278,181.51

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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.