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Finding the Fourth Proportional to 256,817.20, 385,266.84 and 79,282.48

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Solution

The fourth proportional to 256,817.20, 385,266.84 and 79,282.48 is: 118,936.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,817.20 : 385,266.84 = 79,282.48 : x
  2. Step 2: Convert to fraction form
    256,817.20/385,266.84 = 79,282.48/x
  3. Step 3: Cross multiply
    256,817.20x = 385,266.84 × 79,282.48
  4. Step 4: Simplify right side
    256,817.20x = 30,544,910,536.96
  5. Step 5: Solve for x
    x = 30,544,910,536.96/256,817.20
  6. Step 6: Final answer
    x = 118,936.39

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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.