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Finding the Fourth Proportional to 720,620.41, 994,456.38 and 393,934.84

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Solution

The fourth proportional to 720,620.41, 994,456.38 and 393,934.84 is: 543,630.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,620.41 : 994,456.38 = 393,934.84 : x
  2. Step 2: Convert to fraction form
    720,620.41/994,456.38 = 393,934.84/x
  3. Step 3: Cross multiply
    720,620.41x = 994,456.38 × 393,934.84
  4. Step 4: Simplify right side
    720,620.41x = 391,751,014,942.28
  5. Step 5: Solve for x
    x = 391,751,014,942.28/720,620.41
  6. Step 6: Final answer
    x = 543,630.20

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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.