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Finding the Fourth Proportional to 398,393.40, 597,930.30 and 161,905.80

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Solution

The fourth proportional to 398,393.40, 597,930.30 and 161,905.80 is: 242,996.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,393.40 : 597,930.30 = 161,905.80 : x
  2. Step 2: Convert to fraction form
    398,393.40/597,930.30 = 161,905.80/x
  3. Step 3: Cross multiply
    398,393.40x = 597,930.30 × 161,905.80
  4. Step 4: Simplify right side
    398,393.40x = 96,808,383,565.74
  5. Step 5: Solve for x
    x = 96,808,383,565.74/398,393.40
  6. Step 6: Final answer
    x = 242,996.96

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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.