Home / 289,245.12-399,155.22-161,921.76

Finding the Fourth Proportional to 289,245.12, 399,155.22 and 161,921.76

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Solution

The fourth proportional to 289,245.12, 399,155.22 and 161,921.76 is: 223,450.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,245.12 : 399,155.22 = 161,921.76 : x
  2. Step 2: Convert to fraction form
    289,245.12/399,155.22 = 161,921.76/x
  3. Step 3: Cross multiply
    289,245.12x = 399,155.22 × 161,921.76
  4. Step 4: Simplify right side
    289,245.12x = 64,631,915,735.59
  5. Step 5: Solve for x
    x = 64,631,915,735.59/289,245.12
  6. Step 6: Final answer
    x = 223,450.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.