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Finding the Fourth Proportional to 684,942.88, 945,321.45 and 394,498.62

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Solution

The fourth proportional to 684,942.88, 945,321.45 and 394,498.62 is: 544,465.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,942.88 : 945,321.45 = 394,498.62 : x
  2. Step 2: Convert to fraction form
    684,942.88/945,321.45 = 394,498.62/x
  3. Step 3: Cross multiply
    684,942.88x = 945,321.45 × 394,498.62
  4. Step 4: Simplify right side
    684,942.88x = 372,928,007,481.40
  5. Step 5: Solve for x
    x = 372,928,007,481.40/684,942.88
  6. Step 6: Final answer
    x = 544,465.85

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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.