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Finding the Fourth Proportional to 486,107.92, 670,728.78 and 279,336.37

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Solution

The fourth proportional to 486,107.92, 670,728.78 and 279,336.37 is: 385,426.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,107.92 : 670,728.78 = 279,336.37 : x
  2. Step 2: Convert to fraction form
    486,107.92/670,728.78 = 279,336.37/x
  3. Step 3: Cross multiply
    486,107.92x = 670,728.78 × 279,336.37
  4. Step 4: Simplify right side
    486,107.92x = 187,358,942,659.73
  5. Step 5: Solve for x
    x = 187,358,942,659.73/486,107.92
  6. Step 6: Final answer
    x = 385,426.64

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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.