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Finding the Fourth Proportional to 720,433.11, 994,200.78 and 393,752.70

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Solution

The fourth proportional to 720,433.11, 994,200.78 and 393,752.70 is: 543,380.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,433.11 : 994,200.78 = 393,752.70 : x
  2. Step 2: Convert to fraction form
    720,433.11/994,200.78 = 393,752.70/x
  3. Step 3: Cross multiply
    720,433.11x = 994,200.78 × 393,752.70
  4. Step 4: Simplify right side
    720,433.11x = 391,469,241,467.11
  5. Step 5: Solve for x
    x = 391,469,241,467.11/720,433.11
  6. Step 6: Final answer
    x = 543,380.41

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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.