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Finding the Fourth Proportional to 275,136.02, 379,526.84 and 172,999.78

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Solution

The fourth proportional to 275,136.02, 379,526.84 and 172,999.78 is: 238,638.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,136.02 : 379,526.84 = 172,999.78 : x
  2. Step 2: Convert to fraction form
    275,136.02/379,526.84 = 172,999.78/x
  3. Step 3: Cross multiply
    275,136.02x = 379,526.84 × 172,999.78
  4. Step 4: Simplify right side
    275,136.02x = 65,658,059,824.10
  5. Step 5: Solve for x
    x = 65,658,059,824.10/275,136.02
  6. Step 6: Final answer
    x = 238,638.55

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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.