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Finding the Fourth Proportional to 279,007.72, 385,114.98 and 189,635.56

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Solution

The fourth proportional to 279,007.72, 385,114.98 and 189,635.56 is: 261,754.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,007.72 : 385,114.98 = 189,635.56 : x
  2. Step 2: Convert to fraction form
    279,007.72/385,114.98 = 189,635.56/x
  3. Step 3: Cross multiply
    279,007.72x = 385,114.98 × 189,635.56
  4. Step 4: Simplify right side
    279,007.72x = 73,031,494,896.69
  5. Step 5: Solve for x
    x = 73,031,494,896.69/279,007.72
  6. Step 6: Final answer
    x = 261,754.39

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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.