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Finding the Fourth Proportional to 339,136.80, 508,705.20 and 161,989.80

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Solution

The fourth proportional to 339,136.80, 508,705.20 and 161,989.80 is: 242,984.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,136.80 : 508,705.20 = 161,989.80 : x
  2. Step 2: Convert to fraction form
    339,136.80/508,705.20 = 161,989.80/x
  3. Step 3: Cross multiply
    339,136.80x = 508,705.20 × 161,989.80
  4. Step 4: Simplify right side
    339,136.80x = 82,405,053,606.96
  5. Step 5: Solve for x
    x = 82,405,053,606.96/339,136.80
  6. Step 6: Final answer
    x = 242,984.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.