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Finding the Fourth Proportional to 445,469.20, 668,268.60 and 145,877.20

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Solution

The fourth proportional to 445,469.20, 668,268.60 and 145,877.20 is: 218,837.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,469.20 : 668,268.60 = 145,877.20 : x
  2. Step 2: Convert to fraction form
    445,469.20/668,268.60 = 145,877.20/x
  3. Step 3: Cross multiply
    445,469.20x = 668,268.60 × 145,877.20
  4. Step 4: Simplify right side
    445,469.20x = 97,485,152,215.92
  5. Step 5: Solve for x
    x = 97,485,152,215.92/445,469.20
  6. Step 6: Final answer
    x = 218,837.02

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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.