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Finding the Fourth Proportional to 939,940.40, 1,409,910.60 and 903,198.80

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Solution

The fourth proportional to 939,940.40, 1,409,910.60 and 903,198.80 is: 1,354,798.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,940.40 : 1,409,910.60 = 903,198.80 : x
  2. Step 2: Convert to fraction form
    939,940.40/1,409,910.60 = 903,198.80/x
  3. Step 3: Cross multiply
    939,940.40x = 1,409,910.60 × 903,198.80
  4. Step 4: Simplify right side
    939,940.40x = 1,273,429,562,027.28
  5. Step 5: Solve for x
    x = 1,273,429,562,027.28/939,940.40
  6. Step 6: Final answer
    x = 1,354,798.20

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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.