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Finding the Fourth Proportional to 256,859.56, 385,250.46 and 69,885.64

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Solution

The fourth proportional to 256,859.56, 385,250.46 and 69,885.64 is: 104,817.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,859.56 : 385,250.46 = 69,885.64 : x
  2. Step 2: Convert to fraction form
    256,859.56/385,250.46 = 69,885.64/x
  3. Step 3: Cross multiply
    256,859.56x = 385,250.46 × 69,885.64
  4. Step 4: Simplify right side
    256,859.56x = 26,923,474,957.39
  5. Step 5: Solve for x
    x = 26,923,474,957.39/256,859.56
  6. Step 6: Final answer
    x = 104,817.88

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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.