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Finding the Fourth Proportional to 383,195.45, 528,850.97 and 211,130.72

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Solution

The fourth proportional to 383,195.45, 528,850.97 and 211,130.72 is: 291,383.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,195.45 : 528,850.97 = 211,130.72 : x
  2. Step 2: Convert to fraction form
    383,195.45/528,850.97 = 211,130.72/x
  3. Step 3: Cross multiply
    383,195.45x = 528,850.97 × 211,130.72
  4. Step 4: Simplify right side
    383,195.45x = 111,656,683,952.37
  5. Step 5: Solve for x
    x = 111,656,683,952.37/383,195.45
  6. Step 6: Final answer
    x = 291,383.11

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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.