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Finding the Fourth Proportional to 412,945.28, 618,999.58 and 279,839

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Solution

The fourth proportional to 412,945.28, 618,999.58 and 279,839 is: 419,475.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,945.28 : 618,999.58 = 279,839 : x
  2. Step 2: Convert to fraction form
    412,945.28/618,999.58 = 279,839/x
  3. Step 3: Cross multiply
    412,945.28x = 618,999.58 × 279,839
  4. Step 4: Simplify right side
    412,945.28x = 173,220,223,467.62
  5. Step 5: Solve for x
    x = 173,220,223,467.62/412,945.28
  6. Step 6: Final answer
    x = 419,475.01

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1.5x scale

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.