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Finding the Fourth Proportional to 398,735.56, 550,297.76 and 243,777.78

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Solution

The fourth proportional to 398,735.56, 550,297.76 and 243,777.78 is: 336,439.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,735.56 : 550,297.76 = 243,777.78 : x
  2. Step 2: Convert to fraction form
    398,735.56/550,297.76 = 243,777.78/x
  3. Step 3: Cross multiply
    398,735.56x = 550,297.76 × 243,777.78
  4. Step 4: Simplify right side
    398,735.56x = 134,150,365,052.88
  5. Step 5: Solve for x
    x = 134,150,365,052.88/398,735.56
  6. Step 6: Final answer
    x = 336,439.43

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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.