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Finding the Fourth Proportional to 256,091.20, 384,136.80 and 242,969.20

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Solution

The fourth proportional to 256,091.20, 384,136.80 and 242,969.20 is: 364,453.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,091.20 : 384,136.80 = 242,969.20 : x
  2. Step 2: Convert to fraction form
    256,091.20/384,136.80 = 242,969.20/x
  3. Step 3: Cross multiply
    256,091.20x = 384,136.80 × 242,969.20
  4. Step 4: Simplify right side
    256,091.20x = 93,333,410,986.56
  5. Step 5: Solve for x
    x = 93,333,410,986.56/256,091.20
  6. Step 6: Final answer
    x = 364,453.80

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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.