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Finding the Fourth Proportional to 521,477.70, 782,338.60 and 161,629.75

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Solution

The fourth proportional to 521,477.70, 782,338.60 and 161,629.75 is: 242,482.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,477.70 : 782,338.60 = 161,629.75 : x
  2. Step 2: Convert to fraction form
    521,477.70/782,338.60 = 161,629.75/x
  3. Step 3: Cross multiply
    521,477.70x = 782,338.60 × 161,629.75
  4. Step 4: Simplify right side
    521,477.70x = 126,449,189,112.66
  5. Step 5: Solve for x
    x = 126,449,189,112.66/521,477.70
  6. Step 6: Final answer
    x = 242,482.45

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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.