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Finding the Fourth Proportional to 383,137.09, 528,770.71 and 211,072.68

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Solution

The fourth proportional to 383,137.09, 528,770.71 and 211,072.68 is: 291,303.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,137.09 : 528,770.71 = 211,072.68 : x
  2. Step 2: Convert to fraction form
    383,137.09/528,770.71 = 211,072.68/x
  3. Step 3: Cross multiply
    383,137.09x = 528,770.71 × 211,072.68
  4. Step 4: Simplify right side
    383,137.09x = 111,609,051,659.45
  5. Step 5: Solve for x
    x = 111,609,051,659.45/383,137.09
  6. Step 6: Final answer
    x = 291,303.18

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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.