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Finding the Fourth Proportional to 383,086.19, 528,662.57 and 211,004.80

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Solution

The fourth proportional to 383,086.19, 528,662.57 and 211,004.80 is: 291,188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,086.19 : 528,662.57 = 211,004.80 : x
  2. Step 2: Convert to fraction form
    383,086.19/528,662.57 = 211,004.80/x
  3. Step 3: Cross multiply
    383,086.19x = 528,662.57 × 211,004.80
  4. Step 4: Simplify right side
    383,086.19x = 111,550,337,473.66
  5. Step 5: Solve for x
    x = 111,550,337,473.66/383,086.19
  6. Step 6: Final answer
    x = 291,188.61

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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.