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Finding the Fourth Proportional to 408,910.40, 613,365.60 and 113,422.40

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Solution

The fourth proportional to 408,910.40, 613,365.60 and 113,422.40 is: 170,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,910.40 : 613,365.60 = 113,422.40 : x
  2. Step 2: Convert to fraction form
    408,910.40/613,365.60 = 113,422.40/x
  3. Step 3: Cross multiply
    408,910.40x = 613,365.60 × 113,422.40
  4. Step 4: Simplify right side
    408,910.40x = 69,569,398,429.44
  5. Step 5: Solve for x
    x = 69,569,398,429.44/408,910.40
  6. Step 6: Final answer
    x = 170,133.60

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1.5x scale

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.