Home / 428,101.05-642,181.57-171,933.64

Finding the Fourth Proportional to 428,101.05, 642,181.57 and 171,933.64

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Solution

The fourth proportional to 428,101.05, 642,181.57 and 171,933.64 is: 257,912.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,101.05 : 642,181.57 = 171,933.64 : x
  2. Step 2: Convert to fraction form
    428,101.05/642,181.57 = 171,933.64/x
  3. Step 3: Cross multiply
    428,101.05x = 642,181.57 × 171,933.64
  4. Step 4: Simplify right side
    428,101.05x = 110,412,616,899.54
  5. Step 5: Solve for x
    x = 110,412,616,899.54/428,101.05
  6. Step 6: Final answer
    x = 257,912.51

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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.