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Finding the Fourth Proportional to 328,497.66, 492,107.39 and 215,835.57

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Solution

The fourth proportional to 328,497.66, 492,107.39 and 215,835.57 is: 323,333.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,497.66 : 492,107.39 = 215,835.57 : x
  2. Step 2: Convert to fraction form
    328,497.66/492,107.39 = 215,835.57/x
  3. Step 3: Cross multiply
    328,497.66x = 492,107.39 × 215,835.57
  4. Step 4: Simplify right side
    328,497.66x = 106,214,279,021.86
  5. Step 5: Solve for x
    x = 106,214,279,021.86/328,497.66
  6. Step 6: Final answer
    x = 323,333.44

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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.