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Finding the Fourth Proportional to 720,836.78, 994,729.64 and 394,157.41

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Solution

The fourth proportional to 720,836.78, 994,729.64 and 394,157.41 is: 543,923.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,836.78 : 994,729.64 = 394,157.41 : x
  2. Step 2: Convert to fraction form
    720,836.78/994,729.64 = 394,157.41/x
  3. Step 3: Cross multiply
    720,836.78x = 994,729.64 × 394,157.41
  4. Step 4: Simplify right side
    720,836.78x = 392,080,054,095.02
  5. Step 5: Solve for x
    x = 392,080,054,095.02/720,836.78
  6. Step 6: Final answer
    x = 543,923.49

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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.