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Finding the Fourth Proportional to 720,944.82, 994,884.12 and 398,644.20

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Solution

The fourth proportional to 720,944.82, 994,884.12 and 398,644.20 is: 550,118.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,944.82 : 994,884.12 = 398,644.20 : x
  2. Step 2: Convert to fraction form
    720,944.82/994,884.12 = 398,644.20/x
  3. Step 3: Cross multiply
    720,944.82x = 994,884.12 × 398,644.20
  4. Step 4: Simplify right side
    720,944.82x = 396,604,784,110.10
  5. Step 5: Solve for x
    x = 396,604,784,110.10/720,944.82
  6. Step 6: Final answer
    x = 550,118.09

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Double scale
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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.