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Finding the Fourth Proportional to 681,245.64, 940,128.12 and 379,439.64

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Solution

The fourth proportional to 681,245.64, 940,128.12 and 379,439.64 is: 523,631.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,245.64 : 940,128.12 = 379,439.64 : x
  2. Step 2: Convert to fraction form
    681,245.64/940,128.12 = 379,439.64/x
  3. Step 3: Cross multiply
    681,245.64x = 940,128.12 × 379,439.64
  4. Step 4: Simplify right side
    681,245.64x = 356,721,875,406.68
  5. Step 5: Solve for x
    x = 356,721,875,406.68/681,245.64
  6. Step 6: Final answer
    x = 523,631.79

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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.