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Finding the Fourth Proportional to 383,136.55, 528,769.96 and 211,072.14

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Solution

The fourth proportional to 383,136.55, 528,769.96 and 211,072.14 is: 291,302.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,136.55 : 528,769.96 = 211,072.14 : x
  2. Step 2: Convert to fraction form
    383,136.55/528,769.96 = 211,072.14/x
  3. Step 3: Cross multiply
    383,136.55x = 528,769.96 × 211,072.14
  4. Step 4: Simplify right side
    383,136.55x = 111,608,607,024.91
  5. Step 5: Solve for x
    x = 111,608,607,024.91/383,136.55
  6. Step 6: Final answer
    x = 291,302.43

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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.