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Finding the Fourth Proportional to 408,978.24, 613,564.64 and 128,495.60

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Solution

The fourth proportional to 408,978.24, 613,564.64 and 128,495.60 is: 192,773.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,978.24 : 613,564.64 = 128,495.60 : x
  2. Step 2: Convert to fraction form
    408,978.24/613,564.64 = 128,495.60/x
  3. Step 3: Cross multiply
    408,978.24x = 613,564.64 × 128,495.60
  4. Step 4: Simplify right side
    408,978.24x = 78,840,356,555.58
  5. Step 5: Solve for x
    x = 78,840,356,555.58/408,978.24
  6. Step 6: Final answer
    x = 192,773.96

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.