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Finding the Fourth Proportional to 408,938.40, 613,407.60 and 113,450.40

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Solution

The fourth proportional to 408,938.40, 613,407.60 and 113,450.40 is: 170,175.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,938.40 : 613,407.60 = 113,450.40 : x
  2. Step 2: Convert to fraction form
    408,938.40/613,407.60 = 113,450.40/x
  3. Step 3: Cross multiply
    408,938.40x = 613,407.60 × 113,450.40
  4. Step 4: Simplify right side
    408,938.40x = 69,591,337,583.04
  5. Step 5: Solve for x
    x = 69,591,337,583.04/408,938.40
  6. Step 6: Final answer
    x = 170,175.60

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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.