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Finding the Fourth Proportional to 256,839.30, 385,163.16 and 88,311.96

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Solution

The fourth proportional to 256,839.30, 385,163.16 and 88,311.96 is: 132,435.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,839.30 : 385,163.16 = 88,311.96 : x
  2. Step 2: Convert to fraction form
    256,839.30/385,163.16 = 88,311.96/x
  3. Step 3: Cross multiply
    256,839.30x = 385,163.16 × 88,311.96
  4. Step 4: Simplify right side
    256,839.30x = 34,014,513,579.39
  5. Step 5: Solve for x
    x = 34,014,513,579.39/256,839.30
  6. Step 6: Final answer
    x = 132,435.00

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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.