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Finding the Fourth Proportional to 624,651.20, 936,746.40 and 203,940.80

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Solution

The fourth proportional to 624,651.20, 936,746.40 and 203,940.80 is: 305,835.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,651.20 : 936,746.40 = 203,940.80 : x
  2. Step 2: Convert to fraction form
    624,651.20/936,746.40 = 203,940.80/x
  3. Step 3: Cross multiply
    624,651.20x = 936,746.40 × 203,940.80
  4. Step 4: Simplify right side
    624,651.20x = 191,040,810,213.12
  5. Step 5: Solve for x
    x = 191,040,810,213.12/624,651.20
  6. Step 6: Final answer
    x = 305,835.98

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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.