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Finding the Fourth Proportional to 279,236.72, 385,334.53 and 155,049.96

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Solution

The fourth proportional to 279,236.72, 385,334.53 and 155,049.96 is: 213,962.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,236.72 : 385,334.53 = 155,049.96 : x
  2. Step 2: Convert to fraction form
    279,236.72/385,334.53 = 155,049.96/x
  3. Step 3: Cross multiply
    279,236.72x = 385,334.53 × 155,049.96
  4. Step 4: Simplify right side
    279,236.72x = 59,746,102,687.87
  5. Step 5: Solve for x
    x = 59,746,102,687.87/279,236.72
  6. Step 6: Final answer
    x = 213,962.20

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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.