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Finding the Fourth Proportional to 355,404.38, 532,843.21 and 215,129.82

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Solution

The fourth proportional to 355,404.38, 532,843.21 and 215,129.82 is: 322,535.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,404.38 : 532,843.21 = 215,129.82 : x
  2. Step 2: Convert to fraction form
    355,404.38/532,843.21 = 215,129.82/x
  3. Step 3: Cross multiply
    355,404.38x = 532,843.21 × 215,129.82
  4. Step 4: Simplify right side
    355,404.38x = 114,630,463,855.52
  5. Step 5: Solve for x
    x = 114,630,463,855.52/355,404.38
  6. Step 6: Final answer
    x = 322,535.32

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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.