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Finding the Fourth Proportional to 275,306.40, 379,915.20 and 162,136.80

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Solution

The fourth proportional to 275,306.40, 379,915.20 and 162,136.80 is: 223,744.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,306.40 : 379,915.20 = 162,136.80 : x
  2. Step 2: Convert to fraction form
    275,306.40/379,915.20 = 162,136.80/x
  3. Step 3: Cross multiply
    275,306.40x = 379,915.20 × 162,136.80
  4. Step 4: Simplify right side
    275,306.40x = 61,598,234,799.36
  5. Step 5: Solve for x
    x = 61,598,234,799.36/275,306.40
  6. Step 6: Final answer
    x = 223,744.29

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1.5x scale

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.