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Finding the Fourth Proportional to 392,408.40, 587,446.20 and 234,555.60

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Solution

The fourth proportional to 392,408.40, 587,446.20 and 234,555.60 is: 351,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,408.40 : 587,446.20 = 234,555.60 : x
  2. Step 2: Convert to fraction form
    392,408.40/587,446.20 = 234,555.60/x
  3. Step 3: Cross multiply
    392,408.40x = 587,446.20 × 234,555.60
  4. Step 4: Simplify right side
    392,408.40x = 137,788,795,908.72
  5. Step 5: Solve for x
    x = 137,788,795,908.72/392,408.40
  6. Step 6: Final answer
    x = 351,136.20

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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.