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Finding the Fourth Proportional to 398,729.00, 598,209.26 and 128,851.44

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Solution

The fourth proportional to 398,729.00, 598,209.26 and 128,851.44 is: 193,314.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,729.00 : 598,209.26 = 128,851.44 : x
  2. Step 2: Convert to fraction form
    398,729.00/598,209.26 = 128,851.44/x
  3. Step 3: Cross multiply
    398,729.00x = 598,209.26 × 128,851.44
  4. Step 4: Simplify right side
    398,729.00x = 77,080,123,928.08
  5. Step 5: Solve for x
    x = 77,080,123,928.08/398,729.00
  6. Step 6: Final answer
    x = 193,314.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.