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Finding the Fourth Proportional to 263,787.65, 395,736.84 and 86,280.80

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Solution

The fourth proportional to 263,787.65, 395,736.84 and 86,280.80 is: 129,439.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,787.65 : 395,736.84 = 86,280.80 : x
  2. Step 2: Convert to fraction form
    263,787.65/395,736.84 = 86,280.80/x
  3. Step 3: Cross multiply
    263,787.65x = 395,736.84 × 86,280.80
  4. Step 4: Simplify right side
    263,787.65x = 34,144,491,144.67
  5. Step 5: Solve for x
    x = 34,144,491,144.67/263,787.65
  6. Step 6: Final answer
    x = 129,439.31

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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.