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Finding the Fourth Proportional to 398,692,885.20, 598,151,302.20 and 194,227,630.80

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Solution

The fourth proportional to 398,692,885.20, 598,151,302.20 and 194,227,630.80 is: 291,395,995.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,692,885.20 : 598,151,302.20 = 194,227,630.80 : x
  2. Step 2: Convert to fraction form
    398,692,885.20/598,151,302.20 = 194,227,630.80/x
  3. Step 3: Cross multiply
    398,692,885.20x = 598,151,302.20 × 194,227,630.80
  4. Step 4: Simplify right side
    398,692,885.20x = 116,177,510,286,240,848
  5. Step 5: Solve for x
    x = 116,177,510,286,240,848/398,692,885.20
  6. Step 6: Final answer
    x = 291,395,995.76

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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.