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Finding the Fourth Proportional to 383,142.69, 528,778.45 and 211,078.29

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Solution

The fourth proportional to 383,142.69, 528,778.45 and 211,078.29 is: 291,310.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,142.69 : 528,778.45 = 211,078.29 : x
  2. Step 2: Convert to fraction form
    383,142.69/528,778.45 = 211,078.29/x
  3. Step 3: Cross multiply
    383,142.69x = 528,778.45 × 211,078.29
  4. Step 4: Simplify right side
    383,142.69x = 111,613,651,014.85
  5. Step 5: Solve for x
    x = 111,613,651,014.85/383,142.69
  6. Step 6: Final answer
    x = 291,310.92

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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.