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Finding the Fourth Proportional to 624,647.20, 936,740.40 and 203,936.80

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Solution

The fourth proportional to 624,647.20, 936,740.40 and 203,936.80 is: 305,829.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,647.20 : 936,740.40 = 203,936.80 : x
  2. Step 2: Convert to fraction form
    624,647.20/936,740.40 = 203,936.80/x
  3. Step 3: Cross multiply
    624,647.20x = 936,740.40 × 203,936.80
  4. Step 4: Simplify right side
    624,647.20x = 191,035,839,606.72
  5. Step 5: Solve for x
    x = 191,035,839,606.72/624,647.20
  6. Step 6: Final answer
    x = 305,829.98

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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.